參數(shù)資料
型號(hào)： LTC3816IFE#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, PDSO38
封裝： LEAD FREE, PLASTIC, TSSOP-38
文件頁(yè)數(shù)： 1/44頁(yè)
文件大?。?/td> 753K
代理商： LTC3816IFE#PBF
LTC3816
3816f
Typical applicaTion
FeaTures
DescripTion
Single-Phase Wide VIN
Range DC/DC Controller for
Intel IMVP-6/IMVP-6.5 CPUs
The LTC3816 is a single-phase synchronous step-down
DC/DCswitchingregulatorcontrollerthatdrivesN-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, IMON 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.
High Efficiency, Synchronous IMVP-6/ IMVP-6.5 Step-Down Controller
applicaTions
n
Supports 7-Bit IMVP-6/IMVP-6.5 VID Code and
Features
n
Wide VIN Range: 4.5V to 36V Operation with
Optional Line Feedforward Compensation
n
tON(MIN) < 35ns, Capable of Very Low Duty Cycle
n
Temperature Compensated Inductor DCR or Sense
Resistor Output Current Monitoring
n
Differential Remote Output Voltage Sensing with
Programmable Active Voltage Positioning
n
Phase-Lockable Fixed Frequency: 150kHz to 550kHz
n
Programmable UVLO, Preset VOUT at Boot-Up
n
Programmable Slow Slew Rate Sleep State Exit
n
Internal LDO for Single Supply Operation
n
Overvoltage and Overcurrent Protection
n
PWRGD and VRTT# Thermal Throttling Flags
n
Power Optimization During Sleep and Light Load
n
38-Pin Thermally Enhanced eTSSOP and 5mm
× 7mm
QFN Packages
n
Embedded Computing
n
Mobile Computers, Internet Devices
n
Navigation Displays
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and RSENSE
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.
+
PWRGD
CLKEN#
VRTT#
VRON
DPRSLPVR
MODE/SYNC
RFREQ
LFF
VID0-VID6
VRON
DPRSLPVR
MODE/SYNC
INTVCC
PWRGD
CLKEN#
VRTT#
TG
BG
BOOST
SW
BSOURCE
ISENP
ISENN
IMAX
RPTC
22pF
RPTC
470pF
10k
12k
22pF
10pF
2.2nF
CSLEW
SS
ITCFB
PREIMON
ITC
VCC(SEN)
VSS(SEN)
COMP
VFB
SERVO
GND
IMON
VIN
1.9k
V3
3.3V
VCCP
1.1V
1.9k
56
EXTVCC
LTC3816
INTVCC
47F 2 + 10F 2
330F 3
+ 10F 20
4.7F
0.1F
15nF
2.55k
+
VCC(CORE)
NTC
0.33H,
1.3m
VIN
4.5V TO 36V
6.98k
8.25k
5.1k
14k
10k
21k
15nF
IMON
3816 TA01
LOAD CURRENT (A)
30
EFFICIENCY
(%)
POWER
LOSS
(W)
90
100
20
10
80
50
70
60
40
0.01
1
10
3816 TA01b
0
3
9
10
2
1
8
5
7
6
4
0
0.1
VIN = 12V, fOSC = 400kHz
VCC(CORE) = 0.75V, VEXTVCC = 5V
FORCED CONTINUOUS MODE
VIN + VEXTVCC LOSS
EFFICIENCY
Efficiency and Power Loss
vs Load Current
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