LM27762 Series
Low-Noise Positive- and Negative-Output Charge Pump With Integrated LDO
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Low-Noise Positive- and Negative-Output Charge Pump With Integrated LDO
| Part | Current - Output | Mounting Type | Synchronous Rectifier | Output Type | Voltage - Output (Max) | Voltage - Input (Max) [Max] | Supplier Device Package | Voltage - Input (Min) [Min] | Operating Temperature [Max] | Operating Temperature [Min] | Frequency - Switching [Min] | Frequency - Switching [Max] | Package / Case | Number of Outputs | Voltage - Output (Min/Fixed) | Voltage - Output (Min/Fixed) [Min] | Output Configuration | Function | Board Type | Voltage - Input [Min] | Voltage - Input [Max] | Frequency - Switching | Supplied Contents | Main Purpose | Outputs and Type | Outputs and Type | Utilized IC / Part | Regulator Topology | Voltage - Output [Min] | Voltage - Output [Max] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments LM27762DSSR | 250 mA | Surface Mount | Adjustable | -1.5 V, 5 V | 5.5 V | 12-WSON (3x2) | 2.7 V | 85 °C | -40 °C | 1.7 MHz | 2.3 MHz | 12-WFDFN Exposed Pad | 2 | 1.5 V | -5 V | Positive and Negative (Dual Rail) | Step-Up/Step-Down | |||||||||||||
Texas Instruments LM27762DSST | 250 mA | Surface Mount | Adjustable | -1.5 V, 5 V | 5.5 V | 12-WSON (3x2) | 2.7 V | 85 °C | -40 °C | 1.7 MHz | 2.3 MHz | 12-WFDFN Exposed Pad | 2 | 1.5 V | -5 V | Positive and Negative (Dual Rail) | Step-Up/Step-Down | |||||||||||||
Texas Instruments LM27762EVM | 250 mA | Fully Populated | 2.7 V | 5.5 V | 2 MHz | Board(s) | DC/DC, Step Up or Down with LDO | 2 | Non-Isolated | LM27762 | Inverting | -1.8 V | 5.2 V |
Key Features
• Generates Low-Noise Adjustable Positive Supply Voltage Between 1.5 V and 5 V and Negative Supply Voltage Between –1.5 V and –5 VInput Voltage Range 2.7 V to 5.5 V±250-mA Output CurrentInverting Charge Pump Followed by Negative LDO2-MHz Low-Noise Fixed-Frequency Operation2.5-Ω Inverter Output Impedance, VIN= 5 VNegative LDO Dropout Voltage 30 mV at 100 mA, VOUT= –5 VPositive LDO with 45-mV Dropout Voltage at 100 mA, VOUT= 5 V390-µA Quiescent Current (Typical)Shutdown Quiescent Current to 0.5 µA (Typical)Current Limit and Thermal ProtectionPower Good Pin (Active Low)Create a Custom Design Using the LM27762 With the WEBENCH Power DesignerGenerates Low-Noise Adjustable Positive Supply Voltage Between 1.5 V and 5 V and Negative Supply Voltage Between –1.5 V and –5 VInput Voltage Range 2.7 V to 5.5 V±250-mA Output CurrentInverting Charge Pump Followed by Negative LDO2-MHz Low-Noise Fixed-Frequency Operation2.5-Ω Inverter Output Impedance, VIN= 5 VNegative LDO Dropout Voltage 30 mV at 100 mA, VOUT= –5 VPositive LDO with 45-mV Dropout Voltage at 100 mA, VOUT= 5 V390-µA Quiescent Current (Typical)Shutdown Quiescent Current to 0.5 µA (Typical)Current Limit and Thermal ProtectionPower Good Pin (Active Low)Create a Custom Design Using the LM27762 With the WEBENCH Power Designer
Description
AI
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.
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.