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MIC5205-3.3YM5

150mA LDO, fixed 3.3V, 165mV dropout, low noise, SOT-23-5

35000

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Pieza del fabricante：

MIC5205-3.3YM5

Paquete：

SOT-23-5 (2.90 x 1.60 x 1.10 mm)

Marca：
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Descripción

Productos

The MIC5205-3.3YM5 from Microchip is a 150mA low-noise LDO linear voltage regulator with a fixed 3.3V output in a SOT-23-5 package. With an ultra-low dropout voltage of 165mV at 150mA and only 680nA quiescent current in shutdown, it is ideal for battery-powered and noise-sensitive applications.

Especificaciones

Output Voltage 3.3V (fixed)
Corriente de salida 150mA (max)
Dropout Voltage 165mV (typ at 150mA)
Input Voltage 2.5V to 16V
Corriente de reposo 1.5mA (typ, operating)
Shutdown Current 680nA (typ)
Output Noise 30uVrms (typ, 10Hz-100kHz)
PSRR 70dB at 1kHz
Temperatura de funcionamiento -40C to +125C
Paquete SOT-23-5

Características

  • Ultra-low dropout: 165mV at 150mA
  • Low noise: 30uVrms
  • High PSRR: 70dB at 1kHz
  • 680nA shutdown current
  • Reverse-battery protection
  • Current limiting and thermal shutdown
  • NO CAP (stable without output capacitor)
  • Enable/shutdown pin

Aplicaciones

  • RF and wireless modules
  • Audio preamplifiers
  • Battery-powered instruments
  • IoT sensor nodes
  • Low-noise analog circuits

The MIC5205-3.3YM5 from Microchip is a 150mA low-noise LDO regulator with fixed 3.3V output in a tiny SOT-23-5 package. It features an ultra-low dropout voltage of 165mV at full 150mA load, allowing operation from inputs as low as 3.465V. The device achieves exceptionally low output noise of 30uVrms and high PSRR of 70dB at 1kHz, making it ideal for RF and audio applications. The 680nA shutdown current extends battery life in portable devices. The enable pin provides on/off control, and the device is stable without an output capacitor. Reverse-battery protection and thermal shutdown ensure robustness.

The MIC5205-3.3YM5 uses a P-channel MOSFET pass element in a low-dropout configuration. The P-MOSFET gate is driven by the error amplifier which compares the output voltage (through an internal divider for the fixed version) with an internal bandgap reference. The MOSFET pass element allows very low dropout (165mV) because the gate can be driven to ground potential, fully enhancing the transistor. The low output noise of 30uVrms is achieved by the clean bandgap reference and careful layout. The 70dB PSRR at 1kHz rejects input supply ripple and noise. The enable pin controls a bias circuit that shuts down all internal circuitry, reducing current to 680nA. The NO CAP stability (no output capacitor required) results from the internal compensation network.

Pin Nombre Tipo Descripción
1 EN Entrada Input supply voltage (2.5V to 16V)
2 GND Suelo Suelo
3 ES Entrada Enable; HIGH = on, LOW = shutdown
4 NC - No connect (or BYP for noise reduction)
5 OUT Salida 3.3V regulated output
  • RF Module Power: Provides clean 3.3V to Wi-Fi/BLE modules with 30uVrms noise and 70dB PSRR preventing supply noise from degrading receiver sensitivity
  • Audio Preamp Supply: Powers low-noise op-amp circuits with ultra-clean 3.3V rail where switching regulator ripple would compromise SNR
  • IoT Sensor Node: Extends coin-cell battery life with 680nA shutdown between measurement intervals and 165mV dropout maximizing usable battery range
Modelo Fabricante Vout Iout Diferencia clave
MIC5205-5.0YM5 Microchip 5.0V 150mA Fixed 5V version
RT9193-33GB Richtek 3.3V 300mA Higher current, SOT-23-5
ME6211C33M5G Microne 3.3V 500mA Higher current, SOT-23-5
TPS79333DBVR TI 3.3V 150mA Lower noise, higher cost
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