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參數(shù)資料
| 型號： | LTC1628IG#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3 A SWITCHING CONTROLLER, 310 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | 0.209 INCH, PLASTIC, SSOP-28 |
| 文件頁數(shù)： | 1/32頁 |
| 文件大?。?/td> | 360K |
| 代理商： | LTC1628IG#PBF |
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1
LTC1628/LTC1628-PG
High Efficiency, 2-Phase
Synchronous Step-Down Switching Regulators
Figure 1. High Efficiency Dual 5V/3.3V Step-Down Converter
s
Out-of-Phase Controllers Reduce Required Input
Capacitance and Power Supply Induced Noise
s
OPTI-LOOP
TM Compensation Minimizes COUT
s
Dual N-Channel MOSFET Synchronous Drive
s
±1% Output Voltage Accuracy
s
Power Good Output Voltage Monitor (LTC1628-PG)
s
DC Programmed Fixed Frequency 150kHz to 300kHz
s
Wide VIN Range: 3.5V to 36V Operation
s
Very Low Dropout Operation: 99% Duty Cycle
s
Adjustable Soft-Start Current Ramping
s
Foldback Output Current Limiting
s
Latched Short-Circuit Shutdown with Defeat Option
s
Output Overvoltage Protection
s
Remote Output Voltage Sense
s
Low Shutdown IQ: 20A
s
5V and 3.3V Standby Regulators
s
Small 28-Lead SSOP Package
s
Selectable Constant Frequency or Burst Mode
TM
Operation
The LTC
1628/LTC1628-PG 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 adjust-
ment of the frequency 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 VOUT 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-PG includes a power
good output pin that replaces the FLTCPL, fault coupling
control pin of the LTC1628.
s
Notebook and Palmtop Computers, PDAs
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Battery Chargers
s
Portable Instruments
s
Battery-Operated Digital Devices
s
DC Power Distribution Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode and OPTI-LOOP are trademarks of Linear Technology Corporation.
DESCRIPTIO
U
FEATURES
APPLICATIO S
U
TYPICAL APPLICATIO
U
+
4.7
F
D3
D4
D1
M2
M1
CB1, 0.1F
R2
105k
1%
1000pF
L1
6.3
H
CC1
220pF
1
F
CERAMIC
CIN
22
F
50V
CERAMIC
+
COUT1
47
F
6V
SP
RSENSE1
0.01
R1
20k
1%
RC1
15k
VOUT1
5V
5A
D2
M4
M3
CB2, 0.1F
R4
63.4k
1%
L2
6.3
H
CC2
220pF
1000pF
+
COUT
56
F
6V
SP
RSENSE2
0.01
R3
20k
1%
RC2
15k
VOUT2
3.3V
5A
TG1
TG2
BOOST1
BOOST2
SW1
SW2
BG1
BG2
SGND
PGND
SENSE1+
SENSE2+
SENSE1–
SENSE2–
VOSENSE1
VOSENSE2
ITH1
ITH2
VIN
INTVCC
RUN/SS1
RUN/SS2
VIN
5.2V TO 28V
M1, M2, M3, M4: FDS6680A
1628 F01
CSS1
0.1
F
CSS2
0.1
F
LTC1628
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1628IG-SYNC#TR | 3 A SWITCHING CONTROLLER, 360 kHz SWITCHING FREQ-MAX, PDSO28 |
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| LTC1643LCGN#TR | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
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| LTC1729CS8-8.4#TR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1628IG-PG | 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:- 標準包裝: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 |
| LTC1628IG-PG#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:- 標準包裝: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 |
| LTC1628IG-PG#TR | 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:- 標準包裝: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 |
| LTC1628IG-PG#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:- 標準包裝: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 |
| LTC1628IGSYNC | 制造商:Linear Technology 功能描述: |
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