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參數(shù)資料
| 型號： | LTC3789IGN#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.1 A SWITCHING CONTROLLER, 710 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-28 |
| 文件頁數(shù)： | 1/28頁 |
| 文件大?。?/td> | 486K |
| 代理商： | LTC3789IGN#PBF |
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LTC3789
1
3789f
Typical applicaTion
FeaTures
applicaTions
DescripTion
High Efficiency, Synchronous,
4-Switch Buck-Boost Controller
The LTC3789 is a high performance buck-boost switch-
ing regulator controller that operates from input volt-
ages above, below or equal to the output voltage. The
constant-frequency, current mode architecture allows a
phase-lockablefrequencyofupto600kHz,whileanoutput
current feedback loop provides support for battery charg-
ing. With a wide 4V to 38V (40V maximum) input and
output range and seamless, low noise transitions between
operating regions, the LTC3789 is ideal for automotive,
telecom and battery-powered systems.
Theoperatingmodeofthecontrollerisdeterminedthrough
the MODE/PLLIN pin. The MODE/PLLIN pin can select
between pulse-skipping mode and forced continuous
mode operation and allows the IC to be synchronized to
an external clock. Pulse-skipping mode offers the lowest
rippleatlightloads,whileforcedcontinuousmodeoperates
at a constant frequency for noise-sensitive applications.
A power good output pin indicates when the output is
within 10% of its designed set point. The LTC3789 is avail-
able in low profile 28-pin 4mm × 5mm QFN and narrow
SSOP packages.
Efficiency and Power Loss
n
Single Inductor Architecture Allows VIN Above,
Below or Equal to Regulated VOUT
n
Programmable Input or Output Current Feedback Loop
n
Wide VIN Range: 4V to 38V
n
1% Output Voltage Accuracy: 0.8V < VOUT < 38V
n
Synchronous Rectification: Up to 98% Efficiency
n
Current Mode Control
n
Phase-Lockable Fixed Frequency: 200kHz to 600kHz
n
No Reverse Current During Start-Up
n
Power Good Output Voltage Monitor
n
Internal 5.5V LDO
n
Quad N-Channel MOSFET Synchronous Drive
n
VOUT Disconnected from VIN During Shutdown
n
Adjustable Soft-Start Output Ramping
n
Available in 28-Lead QFN (4mm × 5mm) and
28-Lead SSOP Packages
n
Automotive Systems
n
Distributed DC Power Systems
n
High Power Battery-Operated Devices
n
Industrial Control
+
VIN
VINSNS
VOUTSNS
ILIM
PGOOD
0.1F
121k
BOOST1
TG1
SW1
BG1
TG2
BOOST2
SW2
BG2
MODE/PLLIN
RUN
VFB
ITH
SS
0.010
4.7F
A
B
D
C
2200pF
1000pF
1F
CER
10F
16V
CER
330F
16V
ON/OFF
0.01F
4.7H
8k
LTC3789
INTVCC
EXTVCC
SENSE+
IOSENSE–
IOSENSE+
FREQ
SGND
SENSE– PGND
7.5k
1%
3789 TA01
105k
1%
VIN
4V TO
38V
VOUT
12V
5A
+
0.010
22F
50V
CER
L
, LT, LTC, LTM, Linear Technology, the Linear logo, Module and Burst Mode are registered
trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks
are the property of their respective owners. Protected by U.S. Patents, including 5408150,
5481178, 5929620, 6580258, 7365525, 7394231.
VIN (V)
0
EFFICIENCY
(%)
POWER
LOSS
(W)
90
95
85
80
10
15
25
5
20
30
35
40
75
70
100
4
2
8
10
6
0
12
3789 TA01b
VOUT = 12V
ILOAD = 5A
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參數(shù)描述 |
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| LTC3789IUFD#PBF | 功能描述:IC REG CTRLR BST PWM CM 28-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(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 |
| LTC3789IUFD#TRPBF | 功能描述:IC REG CTRLR BST PWM CM 28-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(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 |
| LTC3789IUFDPBF | 制造商:Linear Technology 功能描述:4-Switch Buck-Boost Controller QFN28EP |
| LTC-37XX | 制造商:LITEON 制造商全稱:Lite-On Technology Corporation 功能描述:0.3 FOUR LED CLOCK FREQUENCY DISPLAYS |
| LTC3801BES6#PBF | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Down 2.4V to 9.8V Input 6-Pin TSOT-23 |
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