參數(shù)資料
型號(hào)： LTC3727
廠商： Linear Technology Corporation
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述： 抗輻射高效，5安培開關(guān)穩(wěn)壓器
文件頁數(shù)： 1/32頁
文件大小： 398K
代理商： LTC3727
1
LTC3727/LTC3727-1
High Efficiency, 2-Phase
3727f
Synchronous Step-Down Switching Regulators
Figure 1. High Efficiency Dual 12V/5V Step-Down Converter
I
Wide Output Voltage Range: 0.8V
≤
V
OUT
≤
14V
I
Out-of-Phase Controllers Reduce Required Input
Capacitance and Power Supply Induced Noise
I
OPTI-LOOP
Compensation Minimizes C
OUT
I
±
1% Output Voltage Accuracy
I
Power Good Output Voltage Monitor
I
Phase-Lockable Fixed Frequency 250kHz to 550kHz
I
Latched Short-Circuit Shutdown (LTC3727 Only)
I
Dual N-Channel MOSFET Synchronous Drive
I
Wide V
IN
Range: 4V to 36V Operation
I
Very Low Dropout Operation: 99% Duty Cycle
I
Adjustable Soft-Start Current Ramping
I
Foldback Output Current Limiting
I
Output Overvoltage Protection
I
Low Shutdown I
Q
: 20
μ
A
I
Small 28-Lead SSOP Package
I
LTC3727-1 Also Available in the 5mm
×
5mm QFN
Package
I
Selectable Constant Frequency or Burst Mode
Operation
APPLICATIU
The LTC
3727/LTC3727-1 are high performance dual
step-down switching regulator controllers that drive all
N-channel synchronous power MOSFET stages. A con-
stant 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.
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.
A RUN/SS pin for each controller provides soft-start, and
on the LTC3727GN, optional timed, short-circuit shut-
down. Current foldback limits MOSFET heat dissipation
during short-circuit conditions when overcurrent latchoff
is disabled. Output overvoltage protection circuitry latches
on the bottom MOSFET until V
OUT
returns to normal. The
FCB mode pin can select among Burst Mode, constant
frequency mode and continuous inductor current mode or
regulate a secondary winding. The LTC3727/LTC3727-1
include a power good output pin that indicates when both
outputs are within 7.5% of their designed set point.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode and OPTI-LOOP are registered trademarks of Linear Technology Corporation.
I
Telecom Systems
I
Automotive Systems
I
Battery-Operated Digital Devices
+
4.7
μ
F
M2
M1
0.1
μ
F
105k
1%
1000pF
8
μ
H
220pF
1
μ
F
CERAMIC
22
μ
F
50V
CERAMIC
+
47
μ
F
6V
SP
0.015
20k
1%
15k
V
OUT1
5V
5A
M4
M3
0.1
μ
F
280k
1%
15
μ
H
220pF
1000pF
+
56
μ
F
15V
SP
0.015
20k
1%
15k
V
OUT2
12V
4A
TG1
TG2
BOOST1
BOOST2
SW1
SW2
BG1
BG2
SGND
PGND
SENSE1
+
SENSE2
+
SENSE1
–
V
OSENSE1
SENSE2
–
V
OSENSE2
I
TH1
RUN/SS1
I
TH2
V
IN
PGOOD INTV
CC
RUN/SS2
V
18V TO 28V
M1, M2, M3, M4: FDS6680A
1628 F01
0.1
μ
F
0.1
μ
F
LTC3727/
LTC3727-1
PLLIN
DESCRIPTIOU
FEATURES
TYPICAL APPLICATIO
U
相關(guān)PDF資料
PDF描述
LTC3727EG-1 RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LTC3727EG RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LTC3727-1 RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3727AEG-1#PBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC3727AEG-1#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC3727AIG-1#PBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC3727AIG-1#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC3727EG 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
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