MIC2829 datasheet(9/52 Pages) MICREL

9 / 52 page

Micrel Inc.

MIC2829

May 2010

M9999-051410-B

Electrical Characteristics – Buck Regulator (DC5, DC6)

TA=25

oC, AVINx = ENGLB = ENDC5 = ENDC6 = 4.3V, L = 2.2µH, C

OUT = 2.2µF, IOUT = 100mA, unless otherwise noted.

Bold values indicate -40

°C ≤ T

J ≤ 125°C.

Parameter

Condition

Min

Typ

Max

Unit

Switch Current Limit

VFB = 0.9 V

0.86

1.3

FB Voltage Accuracy

0.97

1.0

1.03

Line Regulation

3.0V

≤ AVIN ≤ 5V , ILOAD = 100mA

0.12

Load Regulation

20mA

≤ IOUT ≤ 300mA

0.2

Soft Start Time

VOUT = 90%; ILOAD = 5mA

100

µs

ISW = +100mA PMOS

0.4

Ω

DC Switch ON Resistance

ISW = -100mA NMOS

0.5

Ω

Switching Frequency

1.6

2.4

MHz

FB Pin Input Current

Electrical Characteristics – Low Dropout Regulators (LDO1 – LDO4, LDO11)

TA=25

oC, AVINx = ENGLB = ENLx = 4.3V, V

INLDOx = Vout+1V, COUT = 1µF, IOUT = 100µA, unless noted.

Bold values indicate -40

°C ≤ T

J ≤ 125°C.

Parameter

Condition

Min

Typ

Max

Unit

Supply Voltage Range

1.8

AVIN

Current Limit

200

Output Voltage Accuracy

-3

Dropout Voltage

LDO2, 4; IOUT = 100mA;

LDO3; IOUT = 100mA;

LDO1, 11; IOUT = 100mA;

115

125

100

210

Line Regulation

VOUT + 1V ≤ VINLDO ≤ 5.5V

0.02

0.2

%/V

Load Regulation

100µA

≤ IOUT ≤ 100mA

0.4

Output Noise

100Hz to 100kHz;

COUT = 2.2µF

µVrms

Ripple Rejection

f = 1kHz, COUT = 2.2µF

Turn On Time

Enable to 90% nominal VOUT

µs

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