MAX5088ATE+ datasheet(3/24 Pages) MAXIM

Part #	MAX5088ATE+

Description	2.2MHz, 2A Buck Converters with an Integrated High-Side Switch

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Manufacturer	MAXIM [Maxim Integrated Products]

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2.2MHz, 2A Buck Converters with an

Integrated High-Side Switch

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(V+ = VL = 5V or V+ = 5.5V to 23V, VEN = 5V, TA = TJ = -40°C to +125°C, unless otherwise noted. Circuits of Figures 5 and 6. Typical

values are at TA = TJ = +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SOFT-START

Digital Soft-Start Period

Internal 6-bit DAC

4096

Clock

periods

Soft-Start Steps

64

Steps

ERROR AMPLIFIER (FB and COMP)

FB to COMP Transconductance

gM

1.20

1.8

2.75

mS

FB Input Bias Current

IFB

250

nA

FB Input Voltage Set Point

VFB

0.5940

0.601

0.6095

V

COMP Sink-and-Source Current

Capability

ICOMP

100

150

µA

INTERNAL MOSFETs

On-Resistance n-Channel Power

MOSFET

RON

V+ = VL = 5.2V, ISINK = 100mA

0.150

0.302

Ω

Leakage Current

ILEAK

VEN = 0V, VDRAIN = 23V,

SOURCE = PGND

20

µA

Minimum Output Current

IOUT

VOUT = 3.3V, V+ = 12V (Note 2)

2

A

Current Limit

ILIMIT

2.2

2.8

3.5

A

On-Resistance Internal Low-Side

Switch

RONLSW

ISWITCH = 50mA, V+ = VL = 5.2V

20

38

Ω

SYNCHRONOUS RECTIFIER DRIVER (DL) (MAX5089 Only)

On-Resistance nMOS

RONDLN

ISINK = 0.1A

1

6.7

Ω

On-Resistance pMOS

RONDLP

ISOURCE = 0.1A

1.9

11.1

Ω

Peak Sink Current

IIDL_SINK

1A

Peak Source Current

IIDL_SOURCE

0.75

A

OSCILLATOR (OSC)/SYNCHRONIZATION (SYNC)/CLOCK OUTPUT (CKO) (MAX5088 Only)

Clock Output-High Level

VCKOH

VL = 5.2V, ISOURCE = 5mA

3.54

V

Clock Output-Low Level

VCKOL

VL = 5.2V, ISINK = 5mA

0.4

V

ROSC = 5.62k

Ω

1900

2100

2400

ROSC = 41.2k

Ω

275

312

350

Switching Frequency

fSW

V+ = VL = 5.2V

ROSC = 10k

Ω

1130

1250

1380

kHz

Minimum Controllable On-Time

tON_MIN

120

ns

MAX5088

82

87.5

Maximum Duty Cycle

DMAX

fSW = 2.2MHz

MAX5089

82

87.5

%

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