MAX15026 datasheet(3/23 Pages) MAXIM

Part #	MAX15026

Description	Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller

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Manufacturer	MAXIM [Maxim Integrated Products]

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Low-Cost, Small, 4.5V to 28V Wide Operating

Range, DC-DC Synchronous Buck Controller

_______________________________________________________________________________________

3

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

ENABLE (EN)

EN Input High

VEN_H

VEN rising

1.14

1.20

1.26

V

EN Input Low

VEN_L

VEN falling

0.997

1.05

1.103

V

EN Input Leakage Current

ILEAK_EN

VEN = 5.5V

-1

+1

µA

OSCILLATOR

Switching Frequency

fSW

RRT = 27k

Ω

540

600

660

kHz

1MHz Switching Frequency

RRT = 15.7k

Ω

0.9

1

1.1

MHz

2MHz Switching Frequency

RRT = 7.2k

Ω

1.8

2.0

2.4

MHz

Switching Frequency Adjustment

Range (Note 3)

200

2000

kHz

RT Voltage

VRT

1.19

1.205

1.22

V

PWM Ramp Peak-to-Peak

Amplitude

VRAMP

1.8

V

PWM Ramp Valley

VVALLEY

0.8

V

Minimum Controllable On-Time

65

100

ns

Maximum Duty Cycle

fSW = 600kHz

85

88

%

Minimum Low-Side On-Time

RRT = 15.7k

Ω

75

110

150

ns

OUTPUT DRIVERS/DRIVER SUPPLY (DRV)

DRV Undervoltage Lockout

VDRV_UVLO VDRV rising

4.0

4.2

4.4

V

DRV Undervoltage Lockout

Hysteresis

400

mV

Low, sinking 100mA, VBST = 5V

1

3

DH On-Resistance

High, sourcing 100mA, VBST = 5V

1.5

4.5

Ω

Low, sinking 100mA, VBST = 5.2V

1

3

DL On-Resistance

High, sourcing 100mA, VBST = 5.2V

1.5

4.5

Ω

Sinking

4

DH Peak Current

CLOAD = 10nF

Sourcing

3

A

Sinking

4

DL Peak Current

CLOAD = 10nF

Sourcing

3

A

DH/DL Break-Before-Make Time

DH at 1V (falling) to DL at 1V (rising)

10 (18, Note 5)

ns

DL/DH Break-Before-Make Time

DL at 1V (falling) to DH at 1V (rising)

10 (20, Note 6)

ns

SOFT-START

Soft-Start Duration

2048

Switching

Cycles

Reference Voltage Steps

64

Steps

CURRENT LIMIT/HICCUP

Current-Limit Threshold

Adjustment Range

Cycle-by-cycle valley current-limit

threshold adjustment range

valley limit = VLIM/10

30

300

mV

ELECTRICAL CHARACTERISTICS (continued)

(VIN = 12V, RRT = 27kΩ, RLIM = 30kΩ, CVCC = 4.7µF, CIN = 1µF, TA = -40°C to +85°C (MAX15026B/CETD+, MAX15026BETD/V+),

TA = TJ = -40°C to +125°C (MAX15026B/C/DATD+), unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)

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Manufacturer	Part #	Datasheet	Description
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