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參數資料
| 型號： | LTC3785EUF-1#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 650 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封裝： | 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD, QFN-24 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 213K |
| 代理商： | LTC3785EUF-1#PBF |
LTC3785-1
1
37851fa
TYPICAL APPLICATION
DESCRIPTION
10V, High Efciency,
Buck-Boost Controller
with Power Good
The LTC3785-1 is a high power synchronous buck-boost
controller that drives all N-channel power MOSFETs from
input voltages above, below and equal to the output volt-
age. With an input range of 2.7V to 10V, the LTC3785-1 is
well suited for a wide variety of single or dual cell Li-Ion
or multicell alkaline/NiMH applications.
The operating frequency can be programmed from 100kHz
to 1MHz. The soft-start time and current limit are also
programmable. The soft-start capacitor doubles as the
fault timer which can program the IC to latch off or recycle
after a determined off time. Burst Mode operation is user
controlled and can be enabled by driving the mode pin
high. The LTC3785-1 includes a power good output that
indicates when the output voltage is within 7.5% of its
designed setpoint.
Protection features include foldback current limit,
short-circuit and overvoltage protection.
Efciency vs Input Voltage
FEATURES
APPLICATIONS
n Palmtop Computers
n Handheld Instruments
n Wireless Modems
n Cellular Telephones
n Single Inductor Architecture Allows VIN Above,
Below or Equal to VOUT
n Power Good Output Indicator
n 2.7V to 10V Input and Output Range
n Up to 96% Efciency
n Up to 10A of Output Current
n All N-channel MOSFETs, No RSENSE
n True Output Disconnect During Shutdown
n Programmable Current Limit and Soft-Start
n Optional Short-Circuit Shutdown Timer
n Output Overvoltage and Undervoltage Protection
n Programmable Frequency: 100kHz to 1MHz
n Selectable Burst Mode Operation
n Available in 24-Lead (4mm
× 4mm) Exposed Pad
QFN Package
L, LT, LTC ,LTM and Burst Mode are registered trademarks of Linear Technology Corporation.
No RSENSE is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
VCC
ISVIN
TG1
VSENSE
BG1
FB
VC
TG2
BG2
SW2
37851 TA01a
VBST1
SW1
ISSW1
ISVOUT
RT
VDRV
ISSW2
VBST2
PGOOD
CCM
ILSET
MODE
RUN/SS
VIN
VOUT
LTC3785-1
GND
4.7μF
0.22μF
VIN
2.7V
TO 10V
VOUT
3.3V
5A
22μF
4.7μH
100μF
215k
12k
49.9k
127k
215k
1.3k
270pF
1nF
2.2nF
42.2k
C
D
B
A
127k
VIN (V)
2.5
EFFICIENCY
(%)
95
10
37851 TA01b
90
85
4
5.5
78.5
100
ILOAD = 1A
VOUT = 3.3V
FOSC = 500kHz
ILOAD = 2A
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC3785EUFPBF | 制造商:Linear Technology 功能描述:10V Synch Buck-Boost Controller LTC3785 |
| LTC3785IUF#PBF | 功能描述:IC REG CTRLR BST PWM VM 24-QFN 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:2,000 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:1MHz 占空比:50% 電源電壓:9 V ~ 10 V 降壓:無 升壓:是 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 包裝:帶卷 (TR) |
| LTC3785IUF#TRPBF | 功能描述:IC REG CTRLR BST PWM VM 24-QFN 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: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 |
| LTC3786EMSE#PBF | 功能描述:IC REG CTRLR BST PWM CM 16-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數: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 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| LTC3786EMSE#PBF | 制造商:Linear Technology 功能描述:IC DC-DC CONV 550kHz MSOP16 制造商:Linear Technology 功能描述:IC, DC-DC CONV, 550kHz, MSOP16 |
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