LM27762DSST
ActiveLOW-NOISE POSITIVE- AND NEGATIVE-OUTPUT CHARGE PUMP WITH INTEGRATED LDO
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LM27762DSST
ActiveLOW-NOISE POSITIVE- AND NEGATIVE-OUTPUT CHARGE PUMP WITH INTEGRATED LDO
Technical Specifications
Parameters and characteristics for this part
| Specification | LM27762DSST |
|---|---|
| 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 - Dual |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive and Negative (Dual Rail) |
| Output Type | Adjustable |
| Package / Case | 12-WFDFN Exposed Pad |
| Supplier Device Package | 12-WSON (3x2) |
| Synchronous Rectifier | False |
| Voltage - Input (Max) [Max] | 5.5 V |
| Voltage - Input (Min) [Min] | 2.7 V |
| Voltage - Output (Max) [Max] | -1.5 V, 5 V |
| Voltage - Output (Min/Fixed) | 1.5 V |
| Voltage - Output (Min/Fixed) | -5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 2.36 | |
| 10 | $ 2.12 | |||
| 25 | $ 2.00 | |||
| 100 | $ 1.70 | |||
| Digi-Reel® | 1 | $ 2.36 | ||
| 10 | $ 2.12 | |||
| 25 | $ 2.00 | |||
| 100 | $ 1.70 | |||
| Tape & Reel (TR) | 250 | $ 1.60 | ||
| 500 | $ 1.40 | |||
| 1250 | $ 1.16 | |||
| 2500 | $ 1.08 | |||
| 6250 | $ 1.04 | |||
| Newark | Each (Supplied on Cut Tape) | 1 | $ 2.88 | |
| 10 | $ 2.75 | |||
| 25 | $ 2.61 | |||
| 50 | $ 2.50 | |||
| 100 | $ 2.39 | |||
| 250 | $ 2.32 | |||
| 500 | $ 2.26 | |||
| 1000 | $ 2.23 | |||
| Texas Instruments | SMALL T&R | 1 | $ 1.77 | |
| 100 | $ 1.47 | |||
| 250 | $ 1.05 | |||
| 1000 | $ 0.79 | |||
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.
Documents
Technical documentation and resources
