MAX1765EEE datasheet(5/19 Pages) MAXIM

5 / 19 page

800mA, Low-Noise, Step-Up DC-DC Converter

with 500mA Linear Regulator

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS

(VOUT = VPOUT = VINL = VONA = VONL = 3.6V, CLK/SEL = FBL = ONB = TRACK = PGND = GND, ISET = REF (bypassed with

0.22µF), LX = open, OUTL = open (bypassed with 4.7µF), TA = -40°C to +85°C, unless otherwise noted.) (Note 6)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DC-DC CONVERTER

FB Regulation Voltage

VFB

CLK/SEL = OUT, 0 < ILX < 0.55A

1.210

1.280

OUT Voltage in Track Mode

VOUTL > 2.0V, INL = POUT

VOUTL

+ 0.4

VOUTL

+ 0.6

Startup to Normal Mode

Transition Voltage

Rising edge only (Note 2)

2.00

2.30

Supply Current in Normal Mode

(Note 3)

CLK/SEL = ONL = GND, no load

200

µA

Supply Current in

Low-Noise PWM Mode (Note 3

CLK/SEL = OUT, VFB = 1.5V, no load

200

µA

Supply Current in Shutdown

ONA = ONL = GND, ONB = OUT

µA

DC-DC SWITCHES

POUT Leakage Current

VLX = 0, VOUT = 5.5V

µA

LX Leakage Current

VLX = VOUT = V ONB = 5.5V, ONA = GND

µA

N-channel

0.28

Switch On-Resistance

P-channel

0.50

Ω

N-Channel Current Limit (Note 4)

ILIM

VISET = 1.25V, CLK/SEL = GND or OUT

1000

1600

P-Channel Turn-Off Current

CLK/SEL = GND

120

REFERENCE

Reference Output Voltage

IREF = 0

1.225

1.275

LINEAR REGULATOR

Output Voltage in Internal

Feedback Mode

FBL = GND, IOUTL = 10mA

2.79

2.90

FBL Input Threshold

150

350

FBL Regulation Voltage

FBL = OUTL, IOUTL = 10mA, IREF = 0

1.225

1.275

LDO Startup Voltage

VOUT = 2V, rising edge only

2.15

2.45

Dropout Resistance

VFBL = 1V, IOUTL = 500mA

0.5

Ω

INL Supply Current in Shutdown

OUTL = ONA = ONL = GND

µA

INL No-Load Supply Current

IOUTL = 0, VINL = 5.5V

250

µA

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