MIC2238-S4YML datasheet(4/16 Pages) MICREL

Part #	MIC2238-S4YML

Description	2.5MHz Dual Phase PWM Buck Regulator

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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Micrel, Inc.

MIC2238

April 2010

4

M9999-040810-A

Absolute Maximum Ratings

(1)

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

Enable 1 Voltage ………………………………………... +6V

Enable 2 Voltage ……………………………………….. +6V

Logic Input Voltage (VEN, VFPWM)............................ VIN to 0V

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

ESD .............................................................................. 2KV

Operating Ratings

(2)

Supply Voltage (VIN) ........................................ 2.5V to 5.5V

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

Package Thermal Resistance (

θJA)..........................60°C/W

Electrical Characteristics

(4)

TA = 25°C with VIN = VEN1 = VEN2 =3.6V, VOUT1, VOUT2, L= 2.2μH, C = 2.2μF, unless otherwise specified. Bold values indicate -40ºC ≤ TJ

≤+125ºC..

Parameter

Condition

Min

Typ

Max

Units

Supply Voltage and Current

Supply Voltage Range

2.5

5.5

V

UVLO (rising)

2.3

2.4

2.5

V

UVLO Hysteresis

100

mV

PWM Mode Supply

Current

/FPWM = Low; VOUT1, VOUT2= 1.03 * VNOM (not switching)

560

950

µA

Trickle Mode Supply

Current

/FPWM = High; VOUT1, VOUT2= 1.03 * VNOM (not switching)

28

50

µA

Shutdown Quiescent

Current

VEN = 0V

0.1

1

µA

Output Voltage Accuracy

Feedback voltage, VFB

Adjustable

0.780

0.8

0.820

V

Output voltage, VOUT

Fixed Output Options

-2.5

+2.5

%

Feedback bias current

10

nA

Output Voltage Line

Regulation

2.5V

≤ VIN ≤ 5.5V

0.1

0.5

%

Output Voltage Load

Regulation

VIN = 5V, IOUT = 10mA to 800mA, /FPWM = 0V

VIN = 3V; IOUT = 10mA to 800mA, /FPWM = 0V

0.5

%

Ripple in Trickle Mode

Vin=3.6V; Iout = 1mA; COUT = 2.2µF, L = 2.2µH.

40

mV

Logic Inputs

On

0.8

1.2

V

EN Input Threshold

Off

0.3

0.7

V

EN Input Current

0.01

1

µA

On

0.6xVIN

V

/FPWM Input Threshold

Off

0.3xVIN

V

/FPWM Input Current

0.01

1

µA

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