LM27762DSSR
ActiveLOW-NOISE POSITIVE- AND NEGATIVE-OUTPUT CHARGE PUMP WITH INTEGRATED LDO
LM27762DSSR
ActiveLOW-NOISE POSITIVE- AND NEGATIVE-OUTPUT CHARGE PUMP WITH INTEGRATED LDO
Description
General part information
LM27762 Series
The LM27762 delivers very low-noise positive and negative outputs that are adjustable between ±1.5 V and ±5 V. Input-voltage range is from 2.7 V to 5.5 V, and output current goes up to ±250 mA. With an operating current of only 390 µA and 0.5-µA typical shutdown current, the LM27762 provides ideal performance for power amplifier and DAC bias and other high-current, low-noise negative voltage needs. The device provides a small solution size with few external components.
Negative voltage is generated by a regulated inverting charge pump followed by a low-noise negative LDO. The inverting charge pump of the LM27762 device operates at 2-MHz (typical) switching frequency to reduce output resistance and voltage ripple. Positive voltage is generated from the input by a low-noise positive LDO.
Positive and negative outputs of LM27762 have dedicated enable inputs. These outputs support independent timing for the positive and negative rails for specific system power-sequence needs. Enable inputs can be also shorted together and connected to the input voltage. The LM27762 has an optional Power Good feature.
Technical Specifications
Parameters and characteristics for this part
| Specification | LM27762DSSR |
|---|---|
| Current - Output | 250 mA |
| Frequency - Switching (Max) | 2.3 MHz |
| Frequency - Switching (Min) | 1.7 MHz |
| Function | Step-Up, Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 2 |
| Operating Temperature (Max) | 85 °C |
| Operating Temperature (Min) | -40 °C |
| Output Configuration | Positive and Negative (Dual Rail), Dual |
| Output Type | Adjustable |
| Package / Case | 12-WFDFN Exposed Pad |
| Package Length | 3 mm |
| Package Name | 12-WSON |
| Package Width | 2 mm |
| Synchronous Rectifier | No |
| Topology | Charge Pump |
| Voltage - Input (Max) | 5.5 V |
| Voltage - Input (Min) | 2.7 V |
| Voltage - Output (Fixed) | 1.5 V |
| Voltage - Output (Max) Negative | -1.5 V |
| Voltage - Output (Max) Positive | 5 V |
| Voltage - Output (Min) | -5 V |
Pricing
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