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參數(shù)資料
| 型號： | LTC3780IG |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High Efficiency, Synchronous, 4-Switch Buck-Boost Controller |
| 中文描述： | 3 A SWITCHING CONTROLLER, 440 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | 5.30 MM, PLASTIC, SSOP-24 |
| 文件頁數(shù)： | 1/28頁 |
| 文件大小： | 421K |
| 代理商： | LTC3780IG |
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1
LTC3780
3780f
High Efficiency, Synchronous,
4-Switch Buck-Boost Controller
DESCRIPTIOU
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-
lockable 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 efficiency
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.
■
Single Inductor Architecture Allows V
IN
Above,
Below or Equal to V
OUT
■
Wide V
IN
Range: 4V to 36V Operation
■
Synchronous Rectification: Up to 98% Efficiency
■
Current Mode Control
■
±
1% Output Voltage Accuracy: 0.8V < V
OUT
< 30V
■
Phase-Lockable Fixed Frequency: 200kHz to 400kHz
■
Power Good Output Voltage Monitor
■
Internal LDO for MOSFET Supply
■
Quad N-Channel MOSFET Synchronous Drive
■
V
OUT
Disconnected from V
IN
During Shutdown
■
Adjustable Soft-Start Current Ramping
■
Foldback Output Current Limiting
■
Selectable Low Current Modes
■
Output Overvoltage Protection
■
Available in 24-Lead SSOP and Exposed Pad
(5mm
×
5mm) 32-Lead QFN Packages
APPLICATIU
■
Automotive Systems
■
Telecom Systems
■
DC Power Distribution Systems
■
High Power Battery-Operated Devices
■
Industrial Control
High Efficiency Buck-Boost Converter
FEATURES
TYPICAL APPLICATIO
U
+
V
IN
TG2
0.1
μ
F
0.1
μ
F
BOOST2
SW2
BG2
TG1
BOOST1
SW1
BG1
PLLIN
RUN
V
OSENSE
I
TH
SS
SGND
SENSE
+
SENSE
–
PGND
FCB
0.010
4.7
μ
F
2200pF
1
μ
F
CER
100
μ
F
16V
CER
ON/OFF
0.1
μ
F
1000pF
2
μ
H
20k
PGOOD
LTC3780
INTV
CC
7.5k
3780 TA01
105k
1%
22
μ
F
50V
CER
V
IN
4V TO 36V
V
OUT
12V
5A
Efficiency and Power Loss
V
OUT
= 12V, I
LOAD
= 5A
V
IN
(V)
0
E
P
90
95
100
15
25
3780 TA01b
85
80
5
10
20
30
35
75
70
8
9
10
7
6
5
4
3
2
1
0
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark 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
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3780IG#PBF | 功能描述:IC REG CTRLR BST PWM CM 24-SSOP 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(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 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(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| LTC3780IG#PBF | 制造商:Linear Technology 功能描述:DC/DC Converter IC |
| LTC3780IG#TR | 制造商:Linear Technology 功能描述:DC DC Cntrlr Dual-OUT Synchronous Boost/Buck Controller 4V to 36V Input 24-Pin SSOP T/R |
| LTC3780IG#TRPBF | 功能描述:IC REG CTRLR BST PWM CM 24-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(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 |
| LTC3780IGPBF | 制造商:Linear Technology 功能描述:DC-DC Controller Step-Up/Down 36V SSOP24 |
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