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LM39302
VSSOP-10 (3x3mm)
The LM39302 from TI is a dual 500mA LDO with adjustable output, low noise, and independent enable pins in VSSOP-10 for multi-rail power supplies.
| Package | VSSOP-10 (3x3mm) |
The LM39302 from TI is a dual 500mA LDO with adjustable output, low noise, and independent enable pins in VSSOP-10 for multi-rail power supplies.
The LM39302 is a dual 500mA adjustable LDO from TI in VSSOP-10, with each channel independently enabled and adjustable. Each channel uses a PMOS pass transistor with an error amplifier that compares the feedback voltage at the ADJ pin with an internal 1.25V reference. The output voltage is set by an external resistor divider: VOUT = 1.25V x (1 + R1/R2). The dropout voltage is 200mV at 500mA per channel. Each channel can be enabled/disabled independently via the EN1/EN2 pins. When disabled, the output is discharged through an internal 500-ohm pulldown resistor, ensuring a clean shutdown. The two channels share a common ground but have separate input supplies (IN1, IN2), allowing each channel to operate from a different input voltage. This is useful for sequencing: Channel 1 can provide a 1.8V core supply from 3.3V, while Channel 2 provides a 1.2V I/O supply from the same 3.3V, with Channel 2 enabled only after Channel 1 is stable (using a resistor divider from OUT1 to EN2). Current limiting is set at 800mA typical per channel. Thermal shutdown occurs at 160C.
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | EN1 | Input | Channel 1 enable (active high) |
| 2 | IN1 | Power | Channel 1 input supply (2.2-5.5V) |
| 3 | OUT1 | Output | Channel 1 output (500mA max, adjustable) |
| 4 | GND | Power | Ground |
| 5 | ADJ1 | Input | Channel 1 feedback (1.25V reference) |
| 6 | ADJ2 | Input | Channel 2 feedback (1.25V reference) |
| 7 | OUT2 | Output | Channel 2 output (500mA max, adjustable) |
| 8 | IN2 | Power | Channel 2 input supply (2.2-5.5V) |
| 9 | EN2 | Input | Channel 2 enable (active high) |
| 10 | NC | – | No connect / Thermal pad |
| Manufacturer | Part Number | Package | Notes |
|---|---|---|---|
| Texas Instruments | TPS74H3301RTER | VSON-10 | Dual 300mA LDO, very low Iq |
| Analog Devices | ADP2291ACPZ-1.0-R7 | LFCSP-10 | Dual 500mA LDO, I2C control |
| Richtek | RT9199-18GB | SOT-23-5 | Single 500mA LDO (x2 needed) |
| Texas Instruments | TLV75533PDBVR | SOT-23-5 | Single 350mA LDO (x2 needed) |
| onsemi | NCP511SN330T1G | TSOP-5 | Single 300mA LDO (x2 needed) |
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
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