LM2757TMX/NOPB ,Switched Capacitor Boost Regulator with High Impedance Output in Shutdown 12-DSBGA -30 to 85Features 3 DescriptionThe LM2757 is a constant-frequency pre-regulated1• Dual Gain Converter (2×, 3 ..
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LM2759SDX/NOPB ,1A Switched Capacitor Flash LED Driver with I2C Compatible Interface 12-WSON -30 to 85Electrical Characteristics tables.(2) All voltages are with respect to the potential to the GND pin ..
LM2759SDX/NOPB ,1A Switched Capacitor Flash LED Driver with I2C Compatible Interface 12-WSON -30 to 85FEATURES APPLICATIONS2• Up to 1A Output Current • Camera Flash in Cellular Phones2• Solution Area < ..
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LM2757TM/NOPB-LM2757TMX/NOPB
Switched Capacitor Boost Regulator with High Impedance Output in Shutdown
LM2757VIN
C2+
C2-
1 μF
0.47 μF
VOUT
1 μF
C1+
C1-
0.47 μF
VIN = 3 V - 5.5 V
B2,B3
C1,C2
GND
VOUT = 4.1 V (100 mA), 4.5 V (110 mA)
5 V (180 mA) D3 D2
COUT
CIN
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LM2757SNVS536F –OCTOBER 2007–REVISED JULY 2015
LM2757 Switched-Capacitor Boost Regulator With High Impedance Outputin Shutdown Features 3 DescriptionThe LM2757isa constant-frequency pre-regulated Dual Gain Converter (2×, 3/2×) Withupto 93% switched-capacitor charge pump that operatesatEfficiency 1.25 MHzto producea low-noise regulated output• Inductorless Solution Uses Only4 Small Ceramic voltage. The device can be configuredto provideCapacitors to 100 mAat 4.1V, 110 mAat 4.5V,or 180 mAat Total Solution Area<12 mm2 V. Excellent efficiencyis achieved without the use inductorby operating the charge pumpina gain• True Input-Output and Output-Input Disconnect either 3/2or2 accordingto the input voltage and• Upto 180-mA Output Current Capability(5V) output voltage option selection.• Selectable 4.1-V, 4.5-Vor 5-V Output The LM2757 presentsa high impedanceat the VOUT• Pre-Regulation Minimizes Input Current Ripple pin when shut down. This allows for use• 1.24-MHz Switching Frequencyfor Low-Noise, applications that require the regulated output bus
Low-Ripple Output Voltage be drivenby another supply while the LM2757is shut
down.• Integrated Overcurrent and Thermal Shutdown
Protection The LM2757 device comesina tiny 12-pin 0.4-mm
pitch DSBGA package. A perfect fit for space-
2 Applications constrained, battery-operated applications, the device
requires only 4 small, inexpensive ceramic• USB/USB-OTG/HDMI Power capacitors. Built-in soft-start, overcurrent protection,• Supercapacitor Charger and thermal shutdown features are also includedin
this device.• Keypad LED Drive Audio Amplifier Power Supply
Device Information(1) Low-Current Camera Flash• General Purpose Li-Ion-to-5-V Conversion• Cellular Phone SIM Cards (1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Typical Application
