參數(shù)資料
型號(hào)： LTC1628-PG
廠商： Linear Technology Corporation
元件分類(lèi)： 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(kāi)關(guān)穩(wěn)壓器
文件頁(yè)數(shù)： 1/32頁(yè)
文件大小： 375K
代理商： LTC1628-PG
1
LTC1628-SYNC
High Efficiency, 2-Phase
Synchronous Step-Down Switching Regulator
Figure 1. High Efficiency Dual 5V/3.3V Step-Down Converter
I
Out-of-Phase Controllers Reduce Required Input
Capacitance and Power Supply Induced Noise
I
OPTI-LOOP
TM
Compensation Minimizes C
OUT
I
Dual N-Channel MOSFET Synchronous Drive
I
±
1% Output Voltage Accuracy
I
Power Good Output Voltage Monitor
I
Phase-Lockable Fixed Frequency 150kHz to 300kHz
I
Wide V
IN
Range: 3.5V to 36V Operation
I
Very Low Dropout Operation: 99% Duty Cycle
I
Adjustable Soft-Start Current Ramping
I
Foldback Output Current Limiting
I
Latched Short-Circuit Shutdown with Defeat Option
I
Output Overvoltage Protection
I
Remote Output Voltage Sense
I
Low Shutdown I
Q
: 20
μ
A
I
5V and 3.3V Standby Regulators
I
Small 28-Lead SSOP Package
I
Selectable Constant Frequency or Burst Mode
TM
Operation
APPLICATIU
The LTC
1628-SYNC is a high performance dual step-
down switching regulator controller that drives all
N-channel synchronous power MOSFET stages. A con-
stant frequency current mode architecture allows phase-
lockable frequency of up to 300kHz. 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. The precision 0.8V reference and power good
output indicator are compatible with future microproces-
sor generations, and a wide 3.5V to 30V (36V maximum)
input supply range encompasses all battery chemistries.
A RUN/SS pin for each controller provides both soft-start
and optional timed, short-circuit shutdown. Current
foldback limits MOSFET 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 LTC1628-SYNC includes 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 trademarks of Linear Technology Corporation.
I
Notebook and Palmtop Computers, PDAs
I
Telecom Systems
I
Portable Instruments
I
Battery-Operated Digital Devices
I
DC Power Distribution Systems
TYPICAL APPLICATIO
U
DESCRIPTIOU
FEATURES
+
4.7
μ
F
D3
D4
D1
M2
M1
C
B1
, 0.1
μ
F
R2
105k
1%
1000pF
L1
6.3
μ
H
C
220pF
R
C1
15k
1
μ
F
CERAMIC
C
IN
22
μ
F
50V
CERAMIC
+
C
OUT1
47
F
6V
SP
R
SENSE1
0.01
R1
20k
1%
V
OUT1
5V
5A
D2
M4
M3
C
B2
, 0.1
μ
F
R4
63.4k
1%
L2
6.3
μ
H
C
C2
220pF
1000pF
+
C
OUT
56
μ
F
6V
SP
R
SENSE2
R3
20k
1%
R
C2
15k
V
3.3V
5A
TG1
TG2
BOOST1
BOOST2
SW1
SW2
BG1
BG2
SGND
PGND
SENSE1
+
SENSE2
+
SENSE1
–
SENSE2
–
V
OSENSE1
V
OSENSE2
I
TH1
RUN/SS1
I
TH2
V
IN
PGOOD INTV
CC
RUN/SS2
V
5.2V TO 28V
M1, M2, M3, M4: FDS6680A
1628 F01
C
SS1
0.1
μ
F
C
SS2
0.1
μ
F
LTC1628-SYNC
PLLIN
f
IN
相關(guān)PDF資料
PDF描述
LTC1628I-PG RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LTC1628C RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LTC1628C-PG RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
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LTC1629CG 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:否 類(lèi)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(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤(pán) 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱(chēng):LM1771SSDX
LTC1629CG#PBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤(pán) 包裝:Digi-Reel® 產(chǎn)品目錄頁(yè)面:1303 (CN2011-ZH PDF) 其它名稱(chēng):LM3754SQDKR
LTC1629CG#TR 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:否 類(lèi)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(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤(pán) 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱(chēng):LM1771SSDX
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