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参数资料
| 型号： | LTC3727AIG-1#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封装： | 5.30 MM, PLASTIC, SSOP-28 |
| 文件页数： | 1/32页 |
| 文件大小： | 328K |
| 代理商： | LTC3727AIG-1#TR |
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LTC3727A-1
1
3727a1fa
TYPICAL APPLICATION
DESCRIPTION
High Efciency, 2-Phase
Synchronous Step-Down
Switching Regulators
The LTC
3727A-1 is a high performance dual step-down
switching regulator controller that drives all N-channel
synchronous power MOSFET stages. A constant frequency
current mode architecture allows phase-lockable frequency
of up to 550kHz. Power loss and noise due to the ESR of
the input capacitors are minimized by operating the two
controller output stages out of phase.
The LTC3727A-1 is an improved version of the LTC3727
family of parts. It has smaller output ripple while in the
drop-out condition and shorter minimum on-time.
OPTI-LOOP compensation allows the transient response to
be optimized over a wide range of output capacitance and
ESR values. There is a precision 0.8V reference and a power
good output indicator. A wide 4V to 30V (36V maximum)
input supply range encompasses all battery chemistries.
ARUN/SSpinforeachcontrollerprovidessoft-start.Current
foldbacklimitsMOSFETheatdissipationduringshort-circuit
conditions. Output overvoltage protection circuitry protects
the controller until VOUT returns to normal.
Figure 1. High Efciency Dual 12V/5V Step-Down Converter
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode and OPTI-LOOP are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 5481178, 5929620, 6177787, 6144194, 6100678,
5408150, 6580258, 6304066, 5705919.
FEATURES
APPLICATIONS
n Telecom Systems
n Automotive Systems
n Battery-Operated Digital Devices
n Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 14V
n Out-of-Phase Controllers Reduce Required Input
Capacitance and Power Supply Induced Noise
n OPTI-LOOP
Compensation Minimizes COUT
n
±1% Output Voltage Accuracy
n Power Good Output Voltage Monitor
n Phase-Lockable Fixed Frequency 250kHz to 550kHz
n Dual N-Channel MOSFET Synchronous Drive
n Wide VIN Range: 4V to 36V Operation
n Very Low Dropout Operation: 99% Duty Cycle
n Adjustable Soft-Start Current Ramping
n Foldback Output Current Limiting
n Output Overvoltage Protection
n Low Shutdown IQ: 20μA
n Selectable Constant Frequency or Burst Mode
Operation
n Small 28-Lead SSOP Package
+
4.7μF
M2
M1
0.1μF
105k
1%
1000pF
8μH
220pF
1μF
CERAMIC
22μF
50V
CERAMIC
+
47μF
6V
SP
0.015Ω
20k
1%
15k
VOUT1
5V
5A
M4
M3
0.1μF
280k
1%
15μH
220pF
1000pF
+ 56μF
15V
SP
0.015Ω
20k
1%
15k
VOUT2
12V
4A
TG1
TG2
BOOST1
BOOST2
SW1
SW2
BG1
BG2
SGND
PGND
SENSE1+
SENSE2+
SENSE1–
SENSE2–
VOSENSE1
VOSENSE2
ITH1
ITH2
VIN PGOOD INTVCC
RUN/SS1
RUN/SS2
VIN
18V TO 28V
M1, M2, M3, M4: FDS6680A
3727 F01
0.1μF
LTC3727A-1
PLLIN
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3727AIG-1#TRPBF | 3 A SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDSO28 |
| LTC3727AIG-1#PBF | 3 A SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDSO28 |
| LTC3736-2EUF#PBF | SWITCHING CONTROLLER, PDSO24 |
| LTC3736-2EUF#TRPBF | SWITCHING CONTROLLER, PQCC24 |
| LTC3736-2EGN#PBF | SWITCHING CONTROLLER, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3727EG | 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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 |
| LTC3727EG#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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 |
| LTC3727EG#TR | 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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 |
| LTC3727EG#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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 |
| LTC3727EG-1 | 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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 |
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