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| 型号： | LTC3714EG#TR |
| 厂商： | Linear Technology |
| 文件页数： | 1/28页 |
| 文件大小： | 0K |
| 描述： | IC STP-DWN CNTRLR W/OPAMP 28SSOP |
| 标准包装： | 2,000 |
| 应用： | 控制器，Intel Pentium? |
| 输入电压： | 4 V ~ 36 V |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 1.75 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 带卷 (TR) |
| 其它名称： | LTC3714EGTR |
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LTC3714
Intel Compatible,
Wide Operating Range, Step-Down Controller
with Internal Op Amp
True Current Mode with Ultrafast Transient Response
Stable with Ceramic C OUT
t ON(MIN) < 100ns for Operation from High Input
Supports Active Voltage Positioning
No Sense Resistor Required
5-Bit VID Programmable Output Voltage: 0.6V to 1.75V
Dual N-Channel MOSFET Synchronous Drive
Programmable Output Offsets
Power Good Output Voltage Monitor
Wide V IN Range: 4V to 36V
±1% 0.6V Reference
Adjustable Frequency
Programmable Soft-Start
Output Overvoltage Protection
Optional Short-Circuit Shutdown Timer
Forced Continuous Control Pin
Logic Controlled Micropower Shutdown: I Q ≤ 30μA
Available in 0.209" Wide 28-Lead SSOP Package
Power Supply for Mobile Pentium ? Processors and
Notebook and Portable Computers
FEATURES
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APPLICATIONS
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Transmeta Processors
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TYPICAL APPLICATION
DESCRIPTION
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
supply sequencing is accomplished using an external
timing capacitor. The regulator current limit level is user
programmable. Wide supply range allows operation from
4V to 36V at the input.
L , LTC and LT are registered trademarks of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corporation.
C C
SENSE
D1*
UPS840
INTV CC
C SS
0.1μF
R C
5-BIT
VID
LTC3714
PGOOD I ON
V IN
RUN/SS TG
I TH SW
BOOST
SGND
INTV CC
VID4 BG
VID3
VID2
VID1
+
R ON
C B , 0.22μF
D B
CMDSH-3
C VCC
4.7μF
M1
IRF7811 L1
×2 0.68μH
M2
IRF7811
×3
0.003?*
+
10μF
35V
×4
C OUT
270μF
2V
×4
V IN
5V TO 24V
V OUT
0.6V TO 1.75V
23A
Transient Response of 8A to 23A Output Load Step
1.395V
V OUT
1.35V
50mV/DIV
1.213V
23A
I LOAD
10A/DIV
VID0
PGND
8A
V OSENSE
3714 F01
20μs/DIV
3714 TA03
*OPTIONAL
Figure 1. High Efficiency Step-Down Converter
3714f
1
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| LTC3716EG | 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3716EG#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3716EG#TR | 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC3716EG#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3717-1#PBF | 制造商:LINEAR 功能描述: 制造商:Linear Technology 功能描述: |
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