參數(shù)資料
型號(hào)： LTC3714
廠商： Linear Technology Corporation
英文描述： Intel Compatible, Wide Operating Range, Step-Down Controller with Internal Op Amp
中文描述： 英特爾兼容，寬工作電壓范圍，降壓型控制器內(nèi)部運(yùn)算放大器
文件頁數(shù)： 1/28頁
文件大?。?/td> 345K
代理商： LTC3714
LTC3714
1
3714f
Intel Compatible,
Wide Operating Range, Step-Down Controller
with Internal Op Amp
DESCRIPTIO
U
I
True Current Mode with Ultrafast Transient
Response
I
Stable with Ceramic C
OUT
I
t
ON(MIN)
< 100ns for Operation from High Input
Ranges
I
Supports Active Voltage Positioning
I
No Sense Resistor Required
I
5-Bit VID Programmable Output Voltage: 0.6V to 1.75V
I
Dual N-Channel MOSFET Synchronous Drive
I
Programmable Output Offsets
I
Power Good Output Voltage Monitor
I
Wide V
IN
Range: 4V to 36V
I
±
1% 0.6V Reference
I
Adjustable Frequency
I
Programmable Soft-Start
I
Output Overvoltage Protection
I
Optional Short-Circuit Shutdown Timer
I
Forced Continuous Control Pin
I
Logic Controlled Micropower Shutdown: I
Q
≤
30
μ
A
I
Available in 0.209" Wide 28-Lead SSOP Package
APPLICATIU
I
Power Supply for Mobile Pentium
Processors and
Transmeta Processors
I
Notebook and Portable Computers
, LTC and LT are registered trademarks of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corporation.
Figure 1. High Efficiency Step-Down Converter
Transient Response of 8A to 23A Output Load Step
The LTC
3714 is a synchronous step-down switching
regulator controller for CPU power. An output voltage
between 0.6V and 1.75V is selected by a 5-bit code (Intel
mobile VID specification). The controller uses a constant
on-time, valley current control architecture to deliver very
low duty cycles without requiring a sense resistor. Oper-
ating frequency is selected by an external resistor and is
compensated for variations in V
IN
and V
OUT
.
Discontinuous mode operation provides high efficiency
operation at light loads. A forced continuous control pin
reduces noise and RF interference and can assist second-
ary winding regulation by disabling discontinuous mode
when the main output is lightly loaded. Internal op amp
allows programmable offsets to the output voltage during
power saving modes.
Fault protection is provided by internal foldback current
limiting, an output overvoltage comparator and optional
short-circuit shutdown timer. Soft-start capability for sup-
ply sequencing is accomplished using an external timing
capacitor. The regulator current limit level is user pro-
grammable. Wide supply range allows operation from 4V
to 36V at the input.
+
D
CMDSH-3
D1*
UPS840
*OPTIONAL
L1
0.68
μ
H
C
VCC
4.7
μ
F
10
μ
F
35V
×
4
V
5V TO 24V
V
0.6V TO 1.75V
23A
+
C
OUT
270
μ
F
2V
×
4
M2
IRF7811
×
3
0.003
*
3714 F01
M1
IRF7811
×
2
R
ON
C
SS
0.1
μ
F
INTV
CC
I
ON
V
IN
TG
SW
BOOST
RUN/SS
I
TH
SGND
INTV
CC
BG
PGND
SENSE
5-BIT
VID
V
OSENSE
PGOOD
VID0
VID1
VID2
VID3
VID4
C
B
, 0.22
μ
F
R
C
LTC3714
C
C
FEATURES
TYPICAL APPLICATIO
U
1.395V
V
(1.35V)
50mV/DIV
1.213V
23A
8A
I
LOAD
10A/DIV
20
μ
s/DIV
3714 TA03
相關(guān)PDF資料
PDF描述
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LTC3714EG#TRPBF 功能描述:IC STP-DWN CNTRLR W/OPAMP 28SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
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