MIC5504/MT

Part: MIC5501/2/3/4 — Microchip

Type: Low-Dropout Linear Regulator (LDO)

Description: 2.5 V to 5.5 V input, 300 mA single-output low-dropout regulator with ±2% accuracy and 160 mV typical dropout voltage at 300 mA.

Operating Conditions:

• Supply voltage: 2.5 V to 5.5 V
• Operating temperature: -40 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: +150 °C (storage -65 to +150 °C, max junction -40 to +150 °C)

Key Specs:

• Output current: 300 mA
• Dropout voltage: 160 mV typ, 380 mV max (IOUT = 300 mA)
• Output voltage accuracy: ±2.0% max (at +25 °C), ±3.0% max (-40 °C to +125 °C)
• Ground pin current: 38 μA typ, 55 μA max (IOUT = 0 mA)
• Ground pin current (full load): 42 μA typ, 65 μA max (IOUT = 300 mA)
• Shutdown current: 0.05 μA typ, 1 μA max (VEN = 0 V)
• 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)
• Turn-on time: 50 μs typ, 125 μs max (COUT = 1 μF, IOUT = 150 mA)

Features:

• Fixed output voltages from 1.0 V to 3.3 V
• Stable with 1 μF ceramic output capacitors
• Active-high enable with zero-off-mode current
• Auto-discharge circuit on output (MIC5502, MIC5504)
• Internal enable pull-down resistor (MIC5503, MIC5504)
• Thermal-shutdown and current-limit protection

Applications:

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

Package:

• 4-Lead UDFN (1.0 mm × 1.0 mm)
• 5-Lead SOT23

• Input Voltage Range: 2.5V to 5.5V
• Fixed Output Voltages from 1.0V to 3.3V
• 300 mA Ensured 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 Ultra Thin DFN Package
• MIC5501/4 5-Lead SOT23 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 2) .................................................................................................................................................. 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:

• Dimensioning and tolerancing per ASME Y14.5M 1.
• BSC: Basic Dimension. Theoretically exact value shown without tolerances.
• For best soldering results, thermal vias, if used, should be filled or tented to avoid solder loss during reflow process 2.

Microchip Technology Drawing C04-3149 Rev A