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LM2757TMX/NOPB

更新时间： 2024-11-29 11:13:55
品牌 Logo 应用领域
德州仪器 - TI 开关电容器稳压器
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27页 1344K
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具有输出（停机时）的开关电容器升压稳压器 | YFQ | 12 | -30 to 85

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LM2757TMX/NOPB 数据手册

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LM2757  
SNVS536F –OCTOBER 2007–REVISED JULY 2015  
LM2757 Switched-Capacitor Boost Regulator With High Impedance Output in Shutdown  
1 Features  
3 Description  
The LM2757 is a constant-frequency pre-regulated  
switched-capacitor charge pump that operates at  
1.25 MHz to produce a low-noise regulated output  
voltage. The device can be configured to provide up  
to 100 mA at 4.1 V, 110 mA at 4.5 V, or 180 mA at 5  
V. Excellent efficiency is achieved without the use of  
an inductor by operating the charge pump in a gain of  
either 3/2 or 2 according to the input voltage and  
output voltage option selection.  
1
•
Dual Gain Converter (2×, 3/2×) With up to 93%  
Efficiency  
•
Inductorless Solution Uses Only 4 Small Ceramic  
Capacitors  
•
•
•
•
•
•
Total Solution Area < 12 mm2  
True Input-Output and Output-Input Disconnect  
Up to 180-mA Output Current Capability (5 V)  
Selectable 4.1-V, 4.5-V or 5-V Output  
The LM2757 presents a high impedance at the VOUT  
pin when shut down. This allows for use in  
applications that require the regulated output bus to  
be driven by another supply while the LM2757 is shut  
down.  
Pre-Regulation Minimizes Input Current Ripple  
1.24-MHz Switching Frequency for Low-Noise,  
Low-Ripple Output Voltage  
•
Integrated Overcurrent and Thermal Shutdown  
Protection  
The LM2757 device comes in a tiny 12-pin 0.4-mm  
pitch DSBGA package. A perfect fit for space-  
constrained, battery-operated applications, the device  
2 Applications  
requires only  
4
small, inexpensive ceramic  
•
•
•
•
•
•
•
USB/USB-OTG/HDMI Power  
Supercapacitor Charger  
capacitors. Built-in soft-start, overcurrent protection,  
and thermal shutdown features are also included in  
this device.  
Keypad LED Drive  
Audio Amplifier Power Supply  
Low-Current Camera Flash  
General Purpose Li-Ion-to-5-V Conversion  
Cellular Phone SIM Cards  
Device Information(1)  
PART NUMBER  
PACKAGE  
BODY SIZE (MAX)  
LM2757  
DSBGA (12)  
1.641 mm × 1.581 mm  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
Typical Application  
V
= 4.1 V (100 mA), 4.5 V (110 mA)  
5 V (180 mA)  
OUT  
V
= 3 V - 5.5 V  
IN  
VIN  
VOUT  
B2,B3  
A3  
A2  
1 µF  
C1+  
C
IN  
1 µF  
C
OUT  
C
1
0.47 µF  
B1  
A1  
C1-  
LM2757  
C2+  
M0  
M1  
D3  
C
2
0.47 µF  
D2  
C3  
C2-  
GND  
C1,C2  
*Bump D1 is No Connect (NC)  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 
 
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LM2757TMX/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM2757TM/NOPB TI

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 具有输出（停机时）的开关电容器升压稳压器 | YFQ | 12 | -30 to 85

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