LM27762DSST
| Parameters | |
|---|---|
| Factory Lead Time | 6 Weeks |
| Lifecycle Status | ACTIVE (Last Updated: 3 days ago) |
| Mount | Surface Mount |
| Mounting Type | Surface Mount |
| Package / Case | 12-WFDFN Exposed Pad |
| Number of Pins | 12 |
| Operating Temperature | -40°C~85°C TA |
| Packaging | Tape & Reel (TR) |
| JESD-609 Code | e4 |
| Pbfree Code | yes |
| Part Status | Active |
| Moisture Sensitivity Level (MSL) | 2 (1 Year) |
| Number of Terminations | 12 |
| ECCN Code | EAR99 |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Pitch | 0.5mm |
| Base Part Number | LM2776 |
| Function | Step-Up/Step-Down |
| Number of Outputs | 2 - Dual |
| Voltage - Input (Max) | 5.5V |
| Output Type | Adjustable |
| Voltage - Input (Min) | 2.7V |
| Input Voltage-Nom | 5V |
| Analog IC - Other Type | SWITCHED CAPACITOR CONVERTER |
| Output Configuration | Positive and Negative (Dual Rail) |
| Current - Output | 250mA |
| Quiescent Current | 390μA |
| Max Output Voltage | 5V |
| Voltage - Output (Min/Fixed) | -5V 1.5V |
| Topology | Charge Pump |
| Frequency - Switching | 1.7MHz~2.3MHz |
| Control Technique | PULSE FREQUENCY MODULATION |
| Synchronous Rectifier | No |
| Min Output Voltage | 1.5V |
| Voltage - Output (Max) | -1.5V 5V |
| Height | 800μm |
| Length | 2mm |
| Width | 3mm |
| Thickness | 750μm |
| RoHS Status | ROHS3 Compliant |
| Lead Free | Lead Free |
Description
The LM27762DSST provides low-noise positive and negative outputs that can be adjusted between ±1.5 and ±5 volts. The input voltage ranges from 2.7 to 5.5 V, with a maximum output current of ±250 mA. The LM27762DSST delivers outstanding performance for power amplifier and DAC bias, as well as other high-current, low-noise negative voltage needs, with an operating current of just 390 μA and a typical shutdown current of 0.5 μA. With only a few external components, the gadget provides a tiny solution size.
A regulated inverting charge pump is used to generate negative voltage, which is then followed by a low-noise negative LDO. The LM27762DSST device's inverting charge pump runs at a 2-MHz (typical) switching frequency to reduce output resistance and voltage ripple. A low-noise positive LDO generates positive voltage from the input.
The LM27762DSST has separate enable inputs for positive and negative outputs. For unique system power-sequence needs, these outputs provide independent timing for the positive and negative rails. Enable inputs can also be connected to the input voltage by shorting them together. The LM27762DSST features a Power Good feature that may be turned on or off.
Features
? 390-μA Quiescent Current (Typical)
? Shutdown Quiescent Current to 0.5 μA (Typical)
? Current Limit and Thermal Protection
? Power Good Pin (Active Low)
? Create a Custom Design Using the LM27762 With the WEBENCH? Power Designer
? 2-MHz Low-Noise Fixed-Frequency Operation
? 2.5-? Inverter Output Impedance, VIN = 5 V
? Negative LDO Dropout Voltage 30 mV at 100 mA, VOUT = –5 V
? Positive LDO with 45-mV Dropout Voltage at 100 mA, VOUT = 5 V
? Generates Low-Noise Adjustable Positive Supply Voltage Between 1.5 V and 5 V and Negative Supply Voltage Between –1.5 V and –5 V
? Input Voltage Range 2.7 V to 5.5 V
? ±250-mA Output Current
? Inverting Charge Pump Followed by Negative LDO
Applications
? Wireless Communication Systems
? Interface Power Supplies
? Handheld Instrumentation
? Hi-Fi Audio Headphone Amplifiers
? Operational Amplifier Power Biasing
? Powering Data Converters