MCP1825ST

Part: MCP1825 / MCP1825S — Microchip Technology

Type: Low Dropout (LDO) Linear Regulator

Description: 2.1–6.0 V input, 500 mA CMOS LDO regulator with 210 mV typical dropout at 500 mA, 120 μA typical quiescent current, and fixed or adjustable (0.8–5.0 V) output.

Operating Conditions:

• Supply voltage: 2.1–6.0 V (VIN ≥ VOUT(MAX) + VDROPOUT(MAX))
• Operating junction temperature: -40 to +125 °C (steady state)
• Output voltage range: 0.8–5.0 V
• Maximum output current: 500 mA

Absolute Maximum Ratings:

• Max input voltage VIN: 6.5 V
• Max voltage on any pin: (GND − 0.3 V) to (VDD + 0.3 V)
• Max junction temperature: +150 °C
• Storage temperature: -65 to +150 °C
• ESD protection on all pins (HBM/MM): ≥ 4 kV / ≥ 300 V

Key Specs:

• Dropout voltage: 210 mV typ, 350 mV max at IOUT = 500 mA
• Quiescent current: 120 μA typ, 220 μA max (IL = 0 mA)
• Shutdown current: 0.1 μA typ, 3 μA max (SHDN = GND)
• Fixed output accuracy: VR ±0.5% typ, ±2.5% max
• Adjust pin reference voltage: 0.410 V typ (0.402–0.418 V)
• Load regulation: ±0.5% typ, ±1.0% max (IOUT = 1 mA to 500 mA)
• Line regulation: ±0.05 %/V typ, ±0.16 %/V max
• Output short circuit current: 1.2 A typ (peak)
• PSRR: 60 dB typ at 100 Hz
• Thermal shutdown: 150 °C typ with 10 °C hysteresis
• PWRGD threshold: 92% of VOUT typ; delay 110 μs typ

Features:

• 500 mA output current capability
• Standard fixed outputs: 0.8 V, 1.2 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, 5.0 V; other options on request
• Stable with 1.0 μF ceramic output capacitor
• Fast response to load transients
• Shutdown pin and fixed-delay Power Good output (MCP1825 only)
• Short-circuit current limiting and overtemperature protection
• MCP1825S is a 3-pin fixed-voltage version

Applications:

• High-speed driver chipset power
• Networking backplane cards
• Notebook computers
• Network interface cards
• Palmtop computers
• 2.5 V to 1.XV regulators

Package:

• MCP1825: TO-263-5 (DDPAK-5), TO-220-5, SOT-223-5
• MCP1825S: TO-263-3 (DDPAK-3), TO-220-3, SOT-223-3

• 500 mA Output Current Capability
• Input Operating Voltage Range: 2.1V to 6.0V
• Adjustable Output Voltage Range: 0.8V to 5.0V (MCP1825 only)
• Standard Fixed Output Voltages: -0.8V, 1.2V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V
• Other Fixed Output Voltage Options Available Upon Request
• Low Dropout Voltage: 210 mV Typical at 500 mA
• Typical Output Voltage Tolerance: 0.5%
• Stable with 1.0 μF Ceramic Output Capacitor
• Fast response to Load Transients
• Low Supply Current: 120 μA (typical)
• Low Shutdown Supply Current: 0.1 μA (typical) (MCP1825 only)
• Fixed Delay on Power Good Output (MCP1825 only)
• Short Circuit Current Limiting and Overtemperature Protection
• TO-263-5 (DDPAK-5), TO-220-5, SOT-223-5 Package Options (MCP1825).
• TO-263-3 (DDPAK-3), TO-220-3, SOT-223-3 Package Options (MCP1825S).

• High-Speed Driver Chipset Power
• Networking Backplane Cards
• Notebook Computers
• Network Interface Cards
• Palmtop Computers
• 2.5V to 1.XV Regulators

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

TABLE 3-1: PIN FUNCTION TABLE

Note 1: The minimum V IN must meet two conditions: V IN ≥ 2.1V and V IN ≥ VOUT(MAX) + VDROPOUT(MAX).

• 2: V R is the nominal regulator output voltage for the fixed cases. V R = 1.2V, 1.8V, etc. V R is the desired set point output voltage for the adjustable cases. V R = V ADJ * ((R 1 /R 2 )+1). Figure 4-1.
• 3: TCV OUT = (V OUT-HIGH - V OUT-LOW ) *10 6 / (V R * Δ Temperature). V OUT-HIGH is the highest voltage measured over the temperature range. V OUT-LOW is the lowest voltage measured over the temperature range.
• 4: Load regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is tested over a load range from 1 mA to the maximum specified output current.
• 5: Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its nominal value that was measured with an input voltage of V IN = V OUT(MAX) + V DROPOUT(MAX) .
• 6: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air. (i.e., T A , T J , θ JA ). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum +150°C rating. Sustained junction temperatures above 150°C can impact device reliability.
• 7: The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the desired junction temperature. The test time is small enough such that the rise in the junction temperature over the ambient temperature is not significant.

† Notice: Stresses above those listed under 'Maximum Ratings' may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.