APW7066
Dual Synchronous Buck PWM Controllers and One Linear Controller
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Two Synchronous Buck Converters and A
Linear Regulator
VIN Range up to 12V
Input Power Supplies Require 12V and 5V or
Use 12V to Generate a Shunt Regulator 5.8V
0.6V Reference for VOUT1 and VOUT3
with 0.8% Accurate
3.3V Reference for VOUT2 with 0.8% Accurate
Buffered VTT Reference Output
Three Outputs have Independent Soft-Start
and Enable
Internal 300kHz Oscillator and Programmable
Frequency Range from 70 kHz to 800kHz
Synchronous Switching Frequency
DDR Mode or Independent Mode Selection
Phase Shift Selection
Power Good Function
Short-Circuit Protection for VOUT1 and VOUT2
Thermally Enhanced TSSOP-24P and
QFN5x5-32 Packages
Lead Free and Green Devices Available
(RoHS Compliant)
General Description
The APW7066 has two synchronous buck PWM control-
lers and one linear controller with high precision internal
references voltage to offer accurate outputs. The PWM
controllers are designed to drive two N-channel MOSFETs
in synchronous buck topology, and the linear controller
drives an external N-channel MOSFET. The device re-
quires 12V and 5V power supplies, if the 5V supply is not
available, VCC12 can offer an optional shunt regulator
5.8V for 5V supply.
All outputs have independent soft-start and enable func-
tions by SS/EN pins to control. Connect a capacitor from
each SS/EN pin to the ground for setting the soft-start
time, and pulling the SS/EN pin below 1V to disable
regulator. Pull the SS2/EN2 to VCC, enter the DDR mode,
the SS1/EN1 controls both VOUT1 and VOUT2, and al-
lows VOUT2 to track VOUT1. It also offers the phase shift
function by REFOUT pin to select the phase shift between
VOUT1 and VOUT2 in DDR mode or Independent mode.
When all SS/EN pins exceed 3.3V and no faults are
detected, the PGOOD pin goes high to indicate the regu-
lators are ready. If any of the SS/EN pins goes below 3.2V
or any of the outputs has a fault condition, the PGOOD pin
will be pulled low.
The internal oscillator is nominally 300kHz (keep the FS/
SYNC pin open or short to GND), and it offers the pro-
grammable frequency function from 70kHz to 800kHz; con-
necting a resistor from FS/SYNC to VCC12 to decrease
the frequency, conversely, connect a resistor from FS/
SYNC to GND to increase the frequency.The IC also pro-
vides the synchronous frequency function. Connect the
LGATE signal of another converter to FS/SYNC pin; forc-
ing the switching frequency to follow the external clock.
The possible synchronous frequency is from 150kHz to
800kHz. There is no R
ds(on)
sensing or under-voltage sens-
ing on APW7066. However, it provides a simple short-
circuit protection by monitoring the COMP1 and COMP2
for over-voltage. When any of two pins exceeds their trip
point and the condition persists for 1-2 internal clock cycle
(3-6µs at 300kHz), then it will shut down all regulators.
Applications
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Graphic Cards
DDR memory Power Supplies
Low-Voltage Distributed Power Supplies
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright
©
ANPEC Electronics Corp.
Rev. A.8 - Aug., 2009
1
www.anpec.com.tw
APW7066
Pin Configuration
COMP2
COMP1
32
FB1 1
COMP1 2
COMP2 3
FB2 4
REFIN 5
REFOUT 6
SS1/EN1 7
SS2/EN2 8
SS3/EN3 9
VREF 10
DRIVE3 11
FB3 12
24
23
22
21
20
19
18
17
16
15
14
13
VCC
BOOT1
UGATE1
VCC12
LGATE1
LGATE2
PGND
UGATE2
BOOT2
GND
PGOOD
FS/SYNC
BOOT1
BOOT2
FB2
FB1
VCC
NC
NC
25
24
UGATE1
PGND_1
VCC12_1
1
REFIN
NC
REFOUT
SS1/EN1
SS2/EN2
SS3/EN3
VREF
DRIVE3
8
FS/SYNC
PGOOD
UGATE2
GND
FB3
NC
NC
9
16
GND
BOTTOM
SIDE PAD
GND
BOTTOM
SIDE PAD
LGATE1
LGATE2
VCC12_2
PGND_2
NC
17
TSSOP-24P
(TOP VIEW)
QFN5x5-32
(Top View)
Ordering and Marking Information
APW7066
Assembly Material
Handling Code
Temperature Range
Package Code
APW7066
XXXXX
Package Code
R : TSSOP-24P QA : QFN5x5-32
Operating Ambient Temperature Range
C : 0 to 70
o
C
Handling Code
TR : Tape & Reel
Assembly Material
G : Halogen and Lead Free Device
XXXXX - Date Code
APW7066 R :
APW7066 QA :
APW7066
XXXXX
XXXXX - Date Code
Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which
are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020D for
MSL classification at lead-free peak reflow temperature. ANPEC defines “Green” to mean lead-free (RoHS compliant) and halogen
free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by
weight).
Copyright
©
ANPEC Electronics Corp.
Rev. A.8 - Aug., 2009
2
www.anpec.com.tw
APW7066
Absolute Maximum Ratings
Symbol
V
CC12
V
CC
V
UGATE1
, V
UGATE2
V
BOOT1
, V
BOOT2
VCC12 to GND
Separate Supply
Shunt Regulator to GND
UGATE1, UGATE2 to GND
BOOT1, BOOT2 to GND
Parameter
Rating
-0.3 to 15
-0.3 to 5.5
-0.3 to 6
-0.3 to 30
Unit
V
V
V
V
LGATE1, LGATE2 LGATE1, LGATE2 to GND
DRIVE3
FS/SYNC
DRIVE3 to GND
FS/SYNC to GND
-0.3 to 15
-0.3 to 15
-0.3 to VCC
-0.3 to VCC
-0.3 to VCC
-0.3 to +0.3
0 to +70
+150
-65 to +150
260
V
V
V
V
V
V
°C
°C
°C
°C
REFIN, REFOUT,
REFIN, REFOUT, PGOOD, VREF to GND
PGOOD, V
REF
FB1, COMP1, FB2,
FB1, COMP1, FB2, COMP2, FB3 to GND
COMP2, FB3
SS1/EN1,
SS1/EN, SS2/EN2, SS3/EN3 to GND
SS2/EN2,
SS3/EN3
PGND
T
A
T
J
T
STG
T
SDR
PGND to GND
Operating Temperature Range
Maximum Junction Temperature
Storage Temperature Range
Maximum Lead Temperature Soldering, 10 Seconds
Thermal Characteristics
Symbol
R
θJA
Thermal Resistance
−
Junction to Case
R
θJC
TSSOP-24P
QFN5x5-32
5
Parameter
Thermal Resistance
−
Junction to Ambient
TSSOP-24P
QFN5x5-32
39
30
Typical Value
Unit
°C/W
°C/W
Electrical Characteristics
Operating Conditions: V
CC
= 5V, V
CC12
= 12V, T
A
= 0 to 70°C, Unless Otherwise Specified.
Symbol
INPUT SUPPLY POWER
V
CC
V
CC12
V
CC12
V
CC
Input Supply Current (Quiescent)
outputs disabled
-
-
-
-
5.6
-
4
6
50
7
5.8
20
-
-
-
-
6.0
60
mA
mA
mA
mA
V
mA
Parameter
Test Conditions
APW7066
Min.
Typ.
Max.
Unit
Input Supply Current (Dynamic)
Shunt Regulator Output Voltage
Shunt Regulator Current
UGATEs, LGATEs C
L
= 1nF, 300kHz
20mA current; ~Equivalent to 300Ω
resistor VCC to 12V
300Ω resistor VCC to 12V
Copyright
©
ANPEC Electronics Corp.
Rev. A.8 - Aug., 2009
3
www.anpec.com.tw
APW7066
Electrical Characteristics (Cont.)
Operating Conditions: V
CC
= 5V, V
CC12
= 12V, T
A
= 0 to 70°C, unless Otherwise Specified.
Symbol
Parameter
Test Conditions
APW7066
Min.
Typ.
Max.
Unit
INPUT SUPPLY POWER (CONT.)
VCC Rising
Power-On Reset Threshold
VCC Falling
VCC12 Rising
VCC12 Falling
SYSTEM ACCURACY
Outputs 1 and 3 Reference Voltage
Output 2 Reference Voltage
Outputs 1 and 2 System Accuracy
Output 3 System Accuracy
OSCILLATOR
Accuracy
Frequency
Adjustment Range
Sawtooth Amplitude
Duty-Cycle Range
ERROR AMPLIFIER (OUT1 AND OUT2)
Open-Loop Gain
Open-Loop Bandwidth
Slew Rate
EA Offset
Maximum Output Voltage
Output High Source Current
Output Low Sink Current
PROTECTION AND MONITOR
Causes PGOOD to go low; if there for a
Under-Voltage Threshold (COMP1 and
filter time, implies the COMP pin(s) is
COMP2)
out-of-range, and shuts down IC
UV Filter Time
PGOOD Low Voltage
LINEAR REGULATOR (OUT3)
EA Offset
DRIVE3 High Output Voltage
DRIVE3 High Output Source Current
DRIVE3 Low Output Sink Current
Copyright
©
ANPEC Electronics Corp.
Rev. A.8 - Aug., 2009
4
DRIVE3 to FB3; compare to internal
VREF
-
-
-
-
2
VCC12
1.5
2.5
-
-
-
-
mA
mA
mV
Based on internal oscillator clock
frequency (nominal 300kHz = 3.3µs
clock period)
IPGOOD = 2mA
-
3.3
-
V
R
L
= 10kΩ to ground
C
L
= 100pF, R
L
= 10kΩ to ground
C
L
= 100pF, R
L
= 10kΩ to ground
COMP1/2 to FB1/2; compare to internal
VREF/REFIN
R
L
= 10kΩ to ground; (may trip
short-circuit)
COMP1/2, VCOMP=2V
COMP1/2, VCOMP=2V
-
-
-
-
-
-
-
85
15
4
2
VCC
-50
45
-
-
-
-
-
-
-
dB
MHz
V/µs
mV
V
mA
mA
FS/SYNC pin open
FS/SYNC pin: resistor to GND; resistor
to VCC12
-20
240
70
-
0
-
300
-
2.1
-
20
360
800
-
85
%
kHz
kHz
V
%
-
-
-0.8
-0.8
0.6
3.3V
-
-
-
-
0.8
0.8
%
%
V
4.15
3.9
7.55
7.1
4.23
4.0
7.8
7.3
4.4
4.15
8
7.55
V
V
V
V
1
-
-
0.1
2
0.3
Clock
pulses
V
www.anpec.com.tw
APW7066
Electrical Characteristics (Cont.)
Operating Conditions: V
CC
= 5V, V
CC12
= 12V, T
A
= 0 to 70°C, unless Otherwise Specified.
Symbol
VREF
Output Voltage
Output Accuracy
Source Current
REFOUT (VTTREF)
Output Voltage
Offset Voltage
Source Current
Sink Current
Output Capacitance
Output High Voltage Minimum
ENABLE/SOFTSTART (SS/EN 1,2,3)
Enable Threshold
EN Rising
EN falling
Soft-Start Current
Soft-Start High Voltage
Output High Voltage
FS/SYNC PLL
Frequency range of Lock-in
High Voltage
GATE DRIVERS
Output1 GATE Driver Source
Output2 GATE Driver Source
Output1 GATE Driver Sink
Output2 GATE Driver Sink
Output Voltage
Output Voltage
UGATE1, LGATE1=3V, BOOT=12V
UGATE2, LGATE2=3V, BOOT=12V
UGATE1, LGATE1=3V, BOOT=12V
UGATE2, UGATE2=3V, BOOT=12V
UGATE1, UGATE2
LGATE1, LGATE2
-
-
-
-
-
-
1.8
1
2.5
4
-
12
-
-
-
-
30
-
A
A
Ω
Ω
V
V
From LG pin of another IC, for example
150
-
-
-
800
12
kHz
V
End of ramp
To select DDR mod; see Table 1
-
-
-
-
-
1.05
0.95
-30
3.5
3.8
-
-
-
-
VCC
µA
V
V
V
To select 0 degree phase; see Table 1
Determined by REFIN voltage
0.6
-10
0.2
-
-
-
-
-
-
-
0.1
3.8
3.3
+10
20
0.48
-
VCC
V
mV
mA
mA
µF
V
1.1µF max capacitance
-
-0.8
-
3.3
-
-
-
+0.8
2.0
V
%
mA
Parameter
Test Conditions
APW7066
Min.
Typ.
Max.
Unit
Copyright
©
ANPEC Electronics Corp.
Rev. A.8 - Aug., 2009
5
www.anpec.com.tw
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