MIC5321 datasheet(5/12 Pages) MICREL

5 / 12 page

Micrel, Inc.

MIC5321

May 2008

M9999-051508-E

Absolute Maximum Ratings(1)

Supply Voltage (VIN) .....................................0V to +6V

Enable Input Voltage (VEN)...........................0V to +6V

Power Dissipation………………….Internally Limited

(3)

Lead Temperature (soldering, 3sec) ..................260°C

Storage Temperature (TS)................ –65°C to +150°C

ESD Rating

(4) .........................................................2kV

Operating Ratings(2)

Supply Voltage (VIN).............................. +2.3V to +5.5V

Enable Input Voltage (VEN).............................. 0V to VIN

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

Junction Thermal Resistance

Thin MLF-6 / MLF-6 (

θJA) ....................... 100°C/W

TSOT-6 (

θJA) ........................................... 235°C/W

Electrical Characteristics(5)

VIN = EN = VOUT + 1.0V; higher of the two regulator outputs, IOUTLDO1 = IOUTLDO2 = 100µA; COUT1 = COUT2 = 1µF;

CBYP = 0.01µF; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted.

Parameter

Conditions

Min

Typ

Max

Units

Variation from nominal VOUT

-2.0

+2.0

Output Voltage Accuracy

Variation from nominal VOUT; –40°C to +125°C

-3.0

+3.0

Line Regulation

VIN = VOUT + 1V to 5.5V; IOUT = 100µA

0.02

0.3

0.6

%/V

Load Regulation

IOUT = 100µA to 150mA

0.5

2.0

Dropout Voltage

(6)

IOUT = 100µA

IOUT = 50mA

IOUT = 100mA

IOUT = 150mA

0.1

100

Ground Current

EN = High; IOUT1 = 150mA, IOUT2 = 150mA

150

190

µA

Ground Current in Shutdown

EN1 ≤ 0.2V

0.01

µA

Ripple Rejection

f = 1kHz; COUT = 1.0µF; CBYP = 0.1µF

f = 20kHz; COUT = 1.0µF; CBYP = 0.1µF

Current Limit

VOUT = 0V

300

550

950

Output Voltage Noise

COUT = 1.0µF; CBYP = 0.01µF; 10Hz to 100kHz

µVRMS

Enable Inputs (EN)

Logic Low

0.2

Enable Input Voltage

Logic High

1.1

VIL ≤ 0.2V

0.01

µA

Enable Input Current

VIH ≥ 1.0V

0.01

µA

Turn-on Time (See Timing Diagram)

Turn-on Time (LDO1 and 2)

COUT = 1.0µF; No CBYP

COUT = 1.0µF; CBYP = 0.01µF

100

µs

Notes:

1. Exceeding the absolute maximum rating may damage the device.

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

3. The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = (TJ(max) – TA) / θJA. Exceeding the maximum allowable

power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.

4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.

5. Specification for packaged product only.

6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below it’s nominal VOUT. For outputs below 2.3V,

the dropout voltage is the input-to-output differential with the minimum input voltage 2.3V

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