MIC5504-1.0YMT-T5

Part: MIC5504-3.3YM5 — Microchip

Type: Low-Dropout (LDO) Linear Regulator

Description: 2.5 V to 5.5 V input, 300 mA single output fixed LDO regulator featuring auto-discharge, internal enable pull-down, and low ground current in compact packaging.

Operating Conditions:

• Supply voltage: 2.5 V to 5.5 V
• Operating temperature: -40 °C to +125 °C (operating junction temperature)
• Enable voltage: 0 V to VIN

Absolute Maximum Ratings:

• Max supply voltage: 6 V (-0.3 V to +6 V)
• Max junction/storage temperature: -65 °C to +150 °C (storage temperature), -40 °C to +150 °C (junction temperature)

Key Specs:

• Output voltage accuracy: ±2.0% (TJ = +25 °C), ±3.0% (TJ = -40 °C to +125 °C)
• Dropout voltage: 160 mV typ., 380 mV max. (IOUT = 300 mA)
• Dropout voltage: 80 mV typ., 190 mV max. (IOUT = 150 mA)
• Ground pin current: 38 μA typ., 55 μA max. (IOUT = 0 mA)
• Ground pin current: 42 μA typ., 65 μA max. (IOUT = 300 mA)
• Current limit: 400 mA min., 630 mA typ., 900 mA max. (VOUT = 0 V)
• Ripple rejection (PSRR): 60 dB typ. (f = 1 kHz, COUT = 1 μF)
• Output noise voltage: 175 μVRMS typ. (COUT = 1 μF, 10 Hz to 100 kHz)
• Auto-discharge NFET resistance: 25 Ω typ. (VEN = 0 V, VIN = 3.6 V, IOUT = -3 mA)

Features:

• Guaranteed 300 mA output current
• Fixed output voltages from 1.0 V to 3.3 V
• Active-high enable with internal 4 MΩ pull-down resistor (MIC5503/MIC5504)
• Internal 25 Ω active output discharge circuit upon shutdown (MIC5502/MIC5504)
• Stable with low-ESR ceramic capacitors (1 μF minimum)
• Thermal shutdown and current limit protection

Applications:

• Smartphones
• DSC, GPS, PMP, and PDAs
• Medical devices
• Portable electronics
• 5 V systems

Package:

• 4-lead Thin DFN (1.0 mm × 1.0 mm)
• 5-lead SOT-23

• Input Voltage Range: 2.5V to 5.5V
• Fixed Output Voltages from 1.0V to 3.3V
• 300 mA Guaranteed Output Current
• High Output Accuracy (±2%)
• Low Quiescent Current: 38 μA
• Stable with 1 μF Ceramic Output Capacitors
• Low Dropout Voltage: 160 mV @ 300 mA
• Output Discharge Circuit: MIC5502, MIC5504
• Internal Enable Pull-Down: MIC5503, MIC5504
• Thermal-Shutdown and Current-Limit Protection
• 4-Lead 1.0 mm x 1.0 mm Thin DFN Package

• Smartphones
• DSC, GPS, PMP, and PDAs
• Medical Devices
• Portable Electronics
• 5V Systems

The descriptions of the pins are listed in Table 3-1.

TABLE 3-1: PIN FUNCTION TABLE

Electrical Characteristics: V IN = V EN = V OUT + 1V; C IN = C OUT = 1 μF; I OUT = 100 μA; T J = +25°C, bold values indicate -40°C to +125°C, unless noted.

Supply Voltage (V IN ) .................................................................................................................................... -0.3V to +6V

Enable Voltage (V EN ) .................................................................................................................................... -0.3V to V IN

Power Dissipation (P D ) ............................................................................................................. Internally Limited, Note

1

ESD Rating (Note

1. ..................................................................................................................................................3

kV

The MIC5501/2/3/4 are designed to provide 300 mA of continuous current in a very small package. Maximum ambient operating temperature can be calculated based on the output current and the voltage drop across the part. For example if the input voltage is 3.6V, the output voltage is 2.8V, and the output current is 300 mA. The actual power dissipation of the regulator circuit can be determined using Equation 4-1: