DATASHEET
ZL8802
Dual Channel/Dual Phase PMBus ChargeMode Control DC/DC Digital Controller
The
ZL8802
is a dual output or dual phase digital DC/DC
controller. Each output can operate independently or be used
together in a dual phase configuration for high current
applications supporting 2-, 4-, 6-, and 8-phase operation with
up to four ZL8802 controllers.
The ZL8802 supports a wide range of output voltages
(0.54V to 5.5V) operating from input voltages as low as 4.5V
up to 14V.
With the fully digital ChargeMode control, the ZL8802 will
respond to a transient load step within a single switching cycle.
This unique compensation-free modulation technique allows
designs to meet transient specifications with minimum output
capacitance, thus saving cost and board space.
The proprietary single-wire Digital-DC™ (DDC) serial bus
enables the ZL8802 to communicate between other Intersil
digital power ICs. By using the DDC, the ZL8802 achieves
complex functions such as inter-IC phase current balancing,
sequencing, and fault spreading. This eliminates complicated
power supply managers with numerous external discrete
components.
The ZL8802 features fast output overcurrent protection. The
input voltage, output voltages, and DrMOS/MOSFET driver
supply voltages are overvoltage and undervoltage protected.
Two external temperature sensors and one internal
temperature sensor are available for temperature monitoring,
one of which can be configured for under- and over-
temperature protection. A snapshot parametric capture
feature allows users to take a snapshot of operating and fault
data during normal or fault conditions.
Integrated Low Dropout (LDO) regulators allow the ZL8802 to
operate from a single input supply eliminating the need for
additional linear regulators. The VDRV LDO output can be used
to power external drivers or DrMOS devices.
With full PMBus compliance, the ZL8802 is capable of
measuring and reporting input voltage, input current, output
voltage, output current, as well as the device’s internal
temperature, two external temperatures, and an auxiliary
voltage or temperature input.
FN8760
Rev.3.00
Nov 8, 2017
Features
• Unique compensation-free design – always stable
• Output voltage range: 0.54V to 5.5V
• Input voltage range: 4.5V to 14V
• 1% output voltage accuracy over line, load, and temperature
• ChargeMode control achieves fast transient response,
reduced output capacitance, and provides output stability
without compensation.
• 2-channel output, 2-, 4-, 6-, or 8-phase output with two,
three, or four devices
• Switching frequency range 200kHz to 1.33MHz
• Proprietary single-wire DDC (Digital-DC) serial bus enables
voltage sequencing and fault spreading with other Intersil
digital power ICs
• Inductor peak and averaged over and undercurrent
protection
• Digital fault protection for output voltage UV/OV, input
voltage UV/OV, temperature, and MOSFET driver voltage
• Accurate average output current measurement with
adjustable gain settings for sensing with SPS current
monitor outputs or high current, low DCR inductors
• Monitor ADC measures input voltage, input current, output
voltage, driver voltage, internal and external temperature
• Nonvolatile memory for storing operating parameters and
fault events
• PMBus compliant
Applications
• Servers and storage equipment
• Telecom and datacom equipment
• Power supplies (memory, DSP, ASIC, FPGA)
Related Literature
• For a full list of related documents, visit our website
-
ZL8802
product page
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
PART NUMBER
ZL8800
ZL8801
ZL8802
DUAL OUTPUT
Yes
No
Yes
DUAL PHASE
Yes
Yes
Yes
DDC CURRENT SHARE
No
Yes
Yes
SPS SUPPORT
No
No
Yes
FN8760 Rev.3.00
Nov 8, 2017
Page 1 of 91
ZL8802
Table of Contents
Two-Phase Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ZL8802 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital-DC Architecture Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Management Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin-Strap Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configurable Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SMBus Device Address Selection (SA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage and VOUT_MAX Selection (VSET0, 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switching Frequency Setting (SYNC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage Undervoltage Lockout Setting (UVLO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration Setting (CFG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ChargeMode Control (ASCR) Setting (ASCRCFG). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start-Up and Shutdown Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Bias Regulators and Input Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start-Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ton-Delay and Rise Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable Pin Operation and Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-Good . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Management Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Overvoltage Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Prebias Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current Limit Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Current Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Overload Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage Tracking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Voltage Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SMBus Communications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital-DC Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Phase Spreading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fault Spreading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Active Current Sharing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Monitoring Using XTEMP Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nonvolatile Memory and Security Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitoring Through SMBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PMBus Command Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PMBus Use Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PMBus Data Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PMBus Command Detail. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MFR_SMBALERT_MASK (DBh). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
11
11
11
12
12
12
12
13
13
14
14
14
15
15
16
16
16
16
16
17
18
18
18
18
19
19
19
20
20
20
20
21
21
21
22
25
26
27
70
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
About Intersil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
FN8760 Rev.3.00
Nov 8, 2017
Page 2 of 91
Two-Phase Application
FN8760 Rev.3.00
Nov 8, 2017
Page 3 of 91
ZL8802
FIGURE 1. TWO-PHASE APPLICATION
ZL8802
Block Diagram
ASCR
DIG ITAL PWM
MODULATOR
PWM+
DEAD TIME
PWMH0
PWMEN0
VSE N0P/N
PGA
ADC
DAC
ASCR
DIG ITAL PWM
MODULATOR
VSE N1P/N
PGA
ADC
PWM+
DEAD TIME
PWMH1
PWMEN1
DAC
XTEMP1P/N
MUX
XTEMP0P/N
MONITOR
ADC
DIG ITAL LOGIC
+
OV/UV/OC/UC
COMPARATORS
VMON/TMO N
VDD
VTRKP/N
EN0/1
PG0/1
OSC
ISENA0
SYNC
PGA
CLK GEN
PLL
Ipea k/IAV G
ADC
ISENB0
Digital-DC
INTER-DEVICE
COMMUNICATIO NS
DDC
MICROCONTROLLER
AND
NONVOLATILE
MEMORY
ISENA1
Ipea k/IAV G
ADC
PGA
ISENB1
SDA
SCL
SALRT
I C AND SMBus
SERIAL
INTERFACE
PIN-STRAP RESISTOR
DETECTION
2
IIN
ADC
VDD
LDO s
GAIN
VDRV
UVLO
VSE T0
VSE T1
ASCRCFG
IINP
VR6
FIGURE 2. BLOCK DIAGRAM
FN8760 Rev.3.00
Nov 8, 2017
VDRVEN
CFG
IINN
VR5
V25
SA
Page 4 of 91
ZL8802
Pin Configuration
ZL8802
(44 LD QFN)
TOP VIEW
(PAD)
Pin Description
PIN
#
1
2
3
4
5
6
7
8
9
10
TYPE
PIN NAME (Note
1)
SCL
SDA
SALRT
SGND
SA
VMON/
TMON
DGND
ASCRCFG
CFG
VSET0
I/O
I/O
O
PWR
M
I
PWR
M
M
M
DESCRIPTION
Serial clock. Connect to external host and/or to other ZL devices. Requires a pull-up resistor to a 2.5V to 5.5V
(VR5 recommended, do not use V25) source. Pull-up supply must be from an “always on” source or VR5.
Serial data. Connect to external host and/or to other ZL devices. Requires a pull-up resistor to a 2.5V to 5.5V
(VR5 recommended, do not use V25) source. Pull-up supply must be from an “always on” source or VR5.
Serial alert. Connect to external host if desired. Requires a pull-up resistor to a 2.5V to 5.5V (recommend VR5, do not use
V25) source. Leave floating if not used.
Connect to low impedance ground plane. Internal connection to SGND. All pin-strap resistors should be connected to SGND.
SGND must be connected to DGND and PGND using a single point connection.
Serial address select pin. Used to assign unique address for each individual device. See
Table 3 on page 12
for PMBus
address options. Connect resistor to SGND.
Smart power stage temperature monitoring or general purpose voltage monitoring pin. Requires an external 2:1 resistor
divider network to correctly read temperature. Requires an external 16:1 resistor divider network to read voltage. Connect
bottom of resistor divider network to SGND. Connect VMON/TMON pin to SGND if not used.
Digital ground. Must connect to SGND and PGND using a single point connection.
Selects ChargeMode control (ASCR) configuration settings. See
“Configurable Pins” on page 12
and
Table 8 on page 14
for details.
Selects current sense, current limit, and operating mode. See
“Configurable Pins” on page 12
and
Table 8 on page 14
for
details.
Channel 0 output voltage selection pin. Used to set V
OUT0
and V
OUT0
max. See
Table 4 on page 12
for V
OUT
pin-strap
options. Default V
OUT
max is 115% of V
OUT
setting, but this can be overridden through the PMBus interface with the
VOUT_MAX command. Connect resistor to SGND.
Channel 1 output voltage selection pin. Used to set V
OUT1
and V
OUT1
max. See
Table 4 on page 12
for V
OUT
pin-strap
options. Default V
OUT
max is 115% of V
OUT
setting, but this can be overridden through the PMBus interface with the
VOUT_MAX command. Connect resistor to SGND. NOT USED IN 2-PHASE MODE. Leave floating in 2-phase mode.
Channel 0 Power-Good output. Can be configured as open-drain or push-pull using the PMBus interface. Default setting is
open-drain.
11
VSET1
M
12
PG0
O
FN8760 Rev.3.00
Nov 8, 2017
Page 5 of 91
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