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MIC5325

Low VIN/VOUT 400mA ULDO™ with Ultra-Low IQ

Micrel 

Micrel, Inc.

MIC5325

Absolute Maximum Ratings(1)

Supply Voltage (VIN) ............................................ 0V to VBIAS

Bias Voltage (VBIAS) ................................................ 0V to 6V

Enable Voltage (VEN)........................................... 0V to VBIAS

Power Dissipation (PD) ........................... Internally Limited(3)

Lead Temperature (soldering, 10 µsec.).................... 260°C

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

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

ESD Rating(4).................................................................. 2kV

Operating Ratings(2)

Supply Voltage (VIN)......................................... 1.7V to VBIAS

Bias Voltage (VBIAS).......................................... 2.5V to 5.5V

Enable Voltage (VEN)........................................... 0V to VBIAS

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

Junction Thermal Resistance

2x2 Thin MLF-6 (θJA) .........................................90°C/W

Electrical Characteristics(5)

VBIAS = 3.6V or VIN (whichever is greater); VIN = VOUT + 1V; COUT = 1µF; IOUT = 100µA; TJ = 25°C, bold values indicate –40°C to +125°C,

unless noted.

Parameter

Condition

Min.

Typ. Max. Units

Output Voltage Accuracy

VBIAS Line Regulation

VIN Line Regulation

Load Regulation

VIN Dropout Voltage

Ground Pin Current

Ground Pin Current in Shutdown

Ripple Rejection

Current Limit

Output Voltage Noise

Enable Inputs (EN)

Variation from nominal VOUT

VBIAS = VIN to 5.5V; VIN = VOUT + 1V

VBIAS = 5.5V; VIN = VOUT + 1V to 5.5V

IOUT = 100µA to 400mA

IOUT = 400mA

IOUT = 100µA to 400mA; VIN = VEN; VBIAS = 5.5V

VEN ≤ 0.2V

f = up to 1kHz; COUT = 1µF; no CBYP

f = up to 1kHz; COUT = 1µF; CBYP = 10nF

f = 1kHz – 20kHz; COUT = 1µ F; CBYP = 10nF

VOUT = 0V

COUT = 1µF; CBYP = 10nF; 10Hz to 100kHz

–2.0

+2.0

%

0.03

0.6

%

0.02

0.6

%

0.3

2

%

110

250

mV

35

55

µA

0.01

1

µA

60

dB

65

dB

40

dB

450

680

mA

30

µVRMS

Enable Input Voltage

Logic Low

Logic High

0.2

V

1.2

V

Enable Input Current

VIL ≤ 0.2V

VIH ≥ 1V

0.01

µA

0.02

µA

Turn-On Time

COUT = 1µF; CBYP = 10nF

150

500

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, 1.5kΩ in series with 100pF.

5. Specification for packaged product only.

March 2011

3

M9999-030811-C

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