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參數資料
| 型號： | LTC3780MPG#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | 3 A SWITCHING CONTROLLER, 440 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | 5.30 MM, PLASTIC, SSOP-24 |
| 文件頁數： | 1/28頁 |
| 文件大小： | 374K |
| 代理商： | LTC3780MPG#TR |
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LTC3780
1
3780fe
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
High Efciency, Synchronoous,
4-Switch Buck-Boost Controller
The LTC
3780 is a high performance buck-boost switch-
ing regulator controller that operates from input voltages
above, below or equal to the output voltage. The constant
frequency current mode architecture allows a phase-lock-
able frequency of up to 400kHz. With a wide 4V to 30V
(36V maximum) input and output range and seamless
transfers between operating modes, the LTC3780 is ideal
for automotive, telecom and battery-powered systems.
The operating mode of the controller is determined through
the FCB pin. For boost operation, the FCB mode pin can
select among Burst Mode
operation, discontinuous mode
and forced continuous mode. During buck operation, the
FCB mode pin can select among skip-cycle mode, discon-
tinuous mode and forced continuous mode. Burst Mode
operation and skip-cycle mode provide high efciency
operation at light loads while forced continuous mode and
discontinuous mode operate at a constant frequency.
Fault protection is provided by an output overvoltage
comparator and internal foldback current limiting. A power
good output pin indicates when the output is within 7.5%
of its designed set point.
High Efciency Buck-Boost Converter
n Single Inductor Architecture Allows VIN Above,
Below or Equal to VOUT
n Wide VIN Range: 4V to 36V Operation
n Synchronous Rectication: Up to 98% Efciency
n Current Mode Control
n
±1% Output Voltage Accuracy: 0.8V < VOUT < 30V
n Phase-Lockable Fixed Frequency: 200kHz to 400kHz
n Power Good Output Voltage Monitor
n Internal LDO for MOSFET Supply
n Quad N-Channel MOSFET Synchronous Drive
n VOUT Disconnected from VIN During Shutdown
n Adjustable Soft-Start Current Ramping
n Foldback Output Current Limiting
n Selectable Low Current Modes
n Output Overvoltage Protection
n Available in 24-Lead SSOP and Exposed Pad
(5mm
× 5mm) 32-Lead QFN Packages
n Automotive Systems
n Telecom Systems
n DC Power Distribution Systems
n High Power Battery-Operated Devices
n Industrial Control
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 5481178, 6304066, 5929620, 5408150, 6580258,
patent pending on current mode architecture and protection
+
VIN
TG2
0.1μF
BOOST2
SW2
BG2
TG1
BOOST1
SW1
BG1
PLLIN
RUN
VOSENSE
ITH
SS
SGND
FCB
0.010Ω
4.7μF
A
B
D
C
2200pF
1μF
CER
100μF
16V
CER
330μF
16V
ON/OFF
0.1μF
4.7μH
20k
PGOOD
LTC3780
INTVCC
SENSE+ SENSE– PGND
7.5k
1%
3780 TA01
105k
1%
22μF
50V
CER
VIN
5V TO 32V
VOUT
12V
5A
+
VIN (V)
0
EFFICIENCY
(%)
POWER
LOSS
(W)
90
95
100
15
25
3780 TA01b
85
80
510
20
30
35
75
70
8
9
10
7
6
5
4
3
2
1
0
Efciency and Power Loss
VOUT = 12V, ILOAD = 5A
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| LTC3783EDHD | 制造商:Linear Technology 功能描述:LED DRVR 3.3V/5V/9V/12V/15V/18V/24V 16-Pin DFN EP |
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| LTC3783EFE#PBF | 功能描述:IC LED DRVR PWM CONTROL 16-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅動器 系列:- 標準包裝:60 系列:- 恒定電流:- 恒定電壓:- 拓撲:線性（LDO），PWM，升壓（升壓） 輸出數:8 內部驅動器:是 類型 - 主要:背光 類型 - 次要:RGB，白色 LED 頻率:500kHz ~ 1.5MHz 電源電壓:4.75 V ~ 26 V 輸出電壓:45V 安裝類型:* 封裝/外殼:* 供應商設備封裝:* 包裝:* 工作溫度:-40°C ~ 85°C |
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