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MIC5212

Dual 500mA LDO Regulator

Micrel 

MIC5212

Absolute Maximum Ratings (Note 1)

Supply Input Voltage (VIN A or B) ................. –20V to +20V

Power Dissipation (PD) ............................ Internally Limited

Storage Temperature Range ................... –60°C to +150°C

Lead Temperature (soldering, 5 sec.) ....................... 260°C

Micrel

Operating Ratings (Note 2)

Supply Input Voltage (VIN) ............................... 2.5V to 16V

Junction Temperature (TJ) ....................... –40°C to +125°C

Thermal Resistance (θJA)......................................... Note 3

Electrical Characteristics

Regulator A and B VIN = VOUT + 1V; IL = 100µA; CL = 4.7µF; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted.

Symbol

Parameter

Conditions

Min Typical Max Units

VO

Output Voltage Accuracy

variation from specified VOUT

–1

1

%

–2

2

%

∆VO/∆T

Output Voltage

Temperature Coefficient

Note 4

40

ppm/°C

∆VO/VO

Line Regulation

VIN = VOUT + 1V to 16V

0.009 0.05 % / V

0.1 % / V

∆VO/VO

Load Regulation

IL = 0.1mA to 500mA, Note 5

0.05 0.7

%

1.0

%

VIN – VO

Dropout Voltage, Note 6

(per regulator)

IL = 150mA

IL = 500mA

175 275 mV

350 mV

350 500 mV

600 mV

IGND

Ground Pin Current, Note 7

(per regulator)

IL = 150mA

IL = 500mA

1.5

2.5

mA

3.0

mA

12

20

mA

25

mA

PSRR

ILIMIT

Ripple Rejection

Current Limit

Spectral Noise Density

f = 120Hz, IL = 150mA

VOUT = 0V

VOUT = 2.5V, IOUT = 50mA, COUT = 2.2µF

75

dB5

750 1000 mA

500

nV/√Hz

Note 1.

Note 2.

Note 3.

Note 4.

Note 5.

Note 6.

Note 7.

Exceeding the absolute maximum rating may damage the device.

The device is not guaranteed to function outside its operating rating.

Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when

operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction

temperature, TJ(max), the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable power

dissipation at any ambient temperature is calculated using: PD(max) = (TJ(max) – TA) ÷ θJA. Exceeding the maximum allowable power dissipa-

tion will result in excessive die temperature, and the regulator will go into thermal shutdown. The θJA of the 8-lead SOIC (M) is 63°C/W

mounted on a PC board (see “Thermal Considerations” section for further details).

Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.

Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load

range from 0.1mA to 500mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.

Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V

differential.

Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of

the load current plus the ground pin current.

April 2003

3

MIC5212

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