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LTC3816IUHF#PBF

Description
DC/DC Cntrlr Single-OUT Step Down 550kHz Automotive 38-Pin QFN EP Tube
File Size720KB,44 Pages
ManufacturerADI
Websitehttps://www.analog.com
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LTC3816IUHF#PBF Overview

DC/DC Cntrlr Single-OUT Step Down 550kHz Automotive 38-Pin QFN EP Tube

LTC3816IUHF#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
Number of Outputs1
TopologyStep Down
Maximum Switching Frequency (kHz)550
Minimum Input Voltage (V)4.5
Maximum Input Voltage (V)36
Operating Supply Voltage (V)4.5 to 36
Maximum Supply Current (mA)11(Typ)
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)125
Supplier Temperature GradeIndustrial
PackagingTube
Pin Count38
Standard Package NameQFN
Supplier PackageQFN EP
MountingSurface Mount
Package Height0.75(Max)
Package Length7
Package Width5
PCB changed38
Lead ShapeNo Lead
FeaTures
n
n
LTC3816
Single-Phase Wide V
IN
Range DC/DC Controller for
Intel IMVP-6/IMVP-6.5 CPUs
DescripTion
The LTC
®
3816 is a single-phase synchronous step-down
DC/DC switching regulator controller that drives N-channel
power MOSFETs in a constant-frequency voltage mode
architecture. The controller’s leading edge modulation to-
pology allows extremely low output voltages and supports
a phase-lockable switching frequency up to 550kHz. The
output voltage is programmed using a 7-bit VID code.
The LTC3816 features all of the IMVP-6/IMVP-6.5 require-
ments, including start-up to a preset boot voltage, differ-
ential remote output voltage sensing with programmable
active voltage positioning, I
MON
output current reporting,
power optimization during sleep state, and fast or slow
slew rate sleep state exit.
Fault protection features include input undervoltage
lockout, cycle-by-cycle current limit, output overvoltage
protection, and PWRGD and overtemperature flags.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and R
SENSE
is a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners. Protected by U.S. Patents, including 5408150, 5055767, 5481178, 6580258.
n
n
n
n
n
n
n
n
n
n
n
Supports 7-Bit IMVP-6/IMVP-6.5 VID Code and
Features
Wide V
IN
Range: 4.5V to 36V Operation with
Optional Line Feedforward Compensation
t
ON(MIN)
< 35ns, Capable of Very Low Duty Cycle
Temperature Compensated Inductor DCR or Sense
Resistor Output Current Monitoring
Differential Remote Output Voltage Sensing with
Programmable Active Voltage Positioning
Phase-Lockable Fixed Frequency: 150kHz to 550kHz
Programmable UVLO, Preset V
OUT
at Boot-Up
Programmable Slow Slew Rate Sleep State Exit
Internal LDO for Single Supply Operation
Overvoltage and Overcurrent Protection
PWRGD and VRTT# Thermal Throttling Flags
Power Optimization During Sleep and Light Load
38-Pin Thermally Enhanced eTSSOP and 5mm
×
7mm
QFN Packages
applicaTions
n
n
n
Embedded Computing
Mobile Computers, Internet Devices
Navigation Displays
Typical applicaTion
High Efficiency, Synchronous IMVP-6/ IMVP-6.5 Step-Down Controller
V
CCP
1.1V
56Ω
PWRGD
CLKEN#
VRTT#
V3
3.3V
1.9k
1.9k
4.7µF
EXTV
CC
INTV
CC
V
IN
PWRGD
TG
CLKEN#
BOOST
VRTT#
SW
VR
ON
DPRSLPVR
BG
MODE/SYNC
RFREQ
BSOURCE
LFF
LTC3816
I
SENP
VID0-VID6
I
SENN
RPTC
I
MAX
CSLEW
SS
I
TCFB
I
TC
SERVO
V
FB
COMP
GND
PREI
MON
I
MON
V
CC(SEN)
V
SS(SEN)
+
V
IN
4.5V TO 36V
47µF 2 + 10µF 2
Efficiency and Power Loss
vs Load Current
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
V
IN
+ V
EXTVCC
LOSS
0.1
1
LOAD CURRENT (A)
10
3816 TA01b
3816 TA01
0.1µF
0.33µH,
1.3m
NTC
V
IN
= 12V, f
OSC
= 400kHz
V
CC(CORE)
= 0.75V, V
EXTVCC
= 5V
FORCED CONTINUOUS MODE
10
9
8
7
POWER LOSS (W)
VR
ON
DPRSLPVR
MODE/SYNC
INTV
CC
+
V
CC(CORE)
330µF 3
+ 10µF 20
2.55k
0.1µF
6.98k
8.25k
EFFICIENCY
6
5
4
3
2
1
0
R
PTC
22pF
470pF
10k
12k
22pF
10pF
10k
15nF 14k
5.1k
21k
I
MON
15nF
0
0.01
2.2nF
3816f


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Description DC/DC Cntrlr Single-OUT Step Down 550kHz Automotive 38-Pin QFN EP Tube DC/DC Cntrlr Single-OUT Step Down 550kHz Automotive 38-Pin TSSOP EP T/R DC/DC Cntrlr Single-OUT Step Down 550kHz Automotive 38-Pin TSSOP EP Tube DC/DC Cntrlr Single-OUT Step Down 550kHz Automotive 38-Pin TSSOP EP T/R DC/DC Cntrlr Single-OUT Step Down 550kHz Automotive 38-Pin QFN EP Tube DC/DC Cntrlr Single-OUT Step Down 550kHz Automotive 38-Pin QFN EP T/R DC/DC Cntrlr Single-OUT Step Down 550kHz Automotive 38-Pin TSSOP EP Tube DC/DC Cntrlr Single-OUT Step Down 550kHz Automotive 38-Pin QFN EP T/R
EU restricts the use of certain hazardous substances Compliant Compliant Compliant Compliant Compliant Compliant Compliant Compliant
ECCN (US) EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Part Status Active Active Active Active Active Active Active Active
Number of Outputs 1 1 1 1 1 1 1 1
Topology Step Down Step Down Step Down Step Down Step Down Step Down Step Down Step Down
Maximum Switching Frequency (kHz) 550 550 550 550 550 550 550 550
Minimum Input Voltage (V) 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5
Maximum Input Voltage (V) 36 36 36 36 36 36 36 36
Operating Supply Voltage (V) 4.5 to 36 4.5 to 36 4.5 to 36 4.5 to 36 4.5 to 36 4.5 to 36 4.5 to 36 4.5 to 36
Maximum Supply Current (mA) 11(Typ) 11(Typ) 11(Typ) 11(Typ) 11(Typ) 11(Typ) 11(Typ) 11(Typ)
Minimum Operating Temperature (°C) -40 -40 -40 -40 -40 -40 -40 -40
Maximum Operating Temperature (°C) 125 125 125 125 125 125 125 125
Supplier Temperature Grade Industrial Industrial Extended Extended Extended Extended Industrial Industrial
Packaging Tube Tape and Reel Tube Tape and Reel Tube Tape and Reel Tube Tape and Reel
Pin Count 38 38 38 38 38 38 38 38
Standard Package Name QFN SOP SOP SOP QFN QFN SOP QFN
Supplier Package QFN EP TSSOP EP TSSOP EP TSSOP EP QFN EP QFN EP TSSOP EP QFN EP
Mounting Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 0.75(Max) 1.05(Max) 1.05(Max) 1.05(Max) 0.75(Max) 0.75(Max) 1.05(Max) 0.75(Max)
Package Length 7 9.8(Max) 9.8(Max) 9.8(Max) 7 7 9.8(Max) 7
Package Width 5 4.5(Max) 4.5(Max) 4.5(Max) 5 5 4.5(Max) 5
PCB changed 38 38 38 38 38 38 38 38
Lead Shape No Lead Gull-wing Gull-wing Gull-wing No Lead No Lead Gull-wing No Lead
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