MIC24046-H datasheet(6/24 Pages) MICREL

Part #	MIC24046-H

Description	Pin-Programmable, 4.5V ??19V, 5A Step-Down Converter

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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Micrel, Inc.

MIC24046-H

July 7, 2015

6

Revision 1.1

Electrical Characteristics

(5) (Continued)

VVIN = VVINLDO = 12V; CVDDA= 2.2µF, CVDDP = 2.2µF, TA = 25°C, unless otherwise noted. Bold values indicate −

40°C ≤ TJ ≤ +125°C.

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Units

Gm Error Amplifier

GmEA

Error-Amplifier

Transconductance

1.5

mmho

AEA

Error-Amplifier DC Gain

50000

V/V

ISR_SNK

Error-Amplifier

Source/Sink Current

−400

+400

µA

COMP_H

COMP Output Swing High

2.4

V

COMP_L

COMP Output Swing Low

0.8

V

GmPS

COMP-to-Inductor Current

Transconductance

VOUT = 1.2V, IOUT = 4A

12.5

A/V

Output Voltage DC Accuracy

OutErr12

Output Voltage Accuracy for

Ranges 1 and 2

4.75V

≤ VIN ≤ 19V, VOUT = 0.7V to 1.8V

TA = TJ = −40°C to 125°C, IOUT = 0A

−1

1

%

OutErr3

Output Voltage Accuracy for

Range 3

4.75V

≤ VIN ≤ 19V, VOUT = 2.49V to

3.3V

TA = TJ = −40°C to 125°C, IOUT = 0A

−1.5

1.5

%

LoadReg

Load Regulation

IOUT = 0A to 5A

0.25

%

LineReg

Line Regulation

6V< VIN < 19V, IOUT = 2A

0.1

%

Internal Soft-Start

SS_SR

Reference Soft-Start Slew

Rate

VOUT = 0.7V, 0.8V, 0.9V, 1.0V, 1.2V

0.45

V/ms

Thermal Shutdown

TSHDN

Thermal Shutdown

160

°C

TSHDN_HYST

Thermal-Shutdown Hysteresis

25

°C

Efficiency

η

Efficiency

VIN = 12V, VOUT = 0.9V, IOUT = 2A

fS = fSZ = 400kHz, L = 1.2µH, TA = 25°C

82.3

%

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