LM2773 Texas instruments

LM2773

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LM2773

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Описание

The LM2773 is a switched capacitor step-down regulator that produces a selectable 1.8V or 1.6V output. It is capable of supplying loads up to 300mA. The LM2773 operates with an input voltage from 2.5V to 5.5V, accommodating 1-cell Li-Ion batteries and chargers. The LM2773 utilizes a regulated charge pump with gains of 2/3x and 1x. It has very low ripple and noise on both the input and output due to its pre-regulated 1.15MHz (typ.) switching frequency and spread spectrum operation. When output currents are low, the LM2773 automatically switches to a low-ripple PFM regulation mode to maintain high efficiency over the entire load range. The LM2773 is available in TI's 0.5mm pitch 9-bump DSBGA.

Low-Noise Spread Spectrum Operation
1.8V/1.6V Selectable Output Voltage
2% Output Voltage Regulation
> 75% Efficiency in 1.8V Mode
Very Low Output Ripple: 10mV @ 300mA
Output Currents up to 300mA
2.5V to 5.5V Input Voltage Range
Shutdown Disconnects Load from V_IN
1.15MHz Switching Frequency
No Inductors…Small Solution Size
Short Circuit and Thermal Protection
0.5mm pitch, DSBGA-9 (1.511 × 1.511mm × 0.6mm)

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Vin (min) (V)	2.5
Vin (max) (V)	5.5
Vout (min) (V)	1.6
Vout (max) (V)	1.8
Iout (max) (A)	0.3
Regulated outputs (#)	1
Switching frequency (min) (kHz)	1150
Switching frequency (max) (kHz)	1150
Iq (typ) (mA)	0.048
Features	Enable
Operating temperature range (°C)	-30 to 85
Rating	Catalog
Type	Charge pump