MAX1795 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX1795

Low-Supply Current, Step-Up DC-DC Converters with True Shutdown

Maxim Integrated 

MAX1795/MAX1796/

MAX1797

Low-Supply Current, Step-Up DC-DC Converters

with True Shutdown

Electrical Characteristics (continued)

(VBATT = +2V, OUT = FB (VOUT = +3.3V), SHDN = LBI = GND, TA = -40°C to +85°C, unless otherwise noted.) (Note 3)

PARAMETER

SYMBOL

CONDITIONS

MIN

MAX UNITS

Internal NFET, PFET

On-Resistance

RDS(ON)

VOUT = +3.3V,

ILX = 100mA

NFET

PFET

0.3

Ω

0.45

LX Switch Current Limit

(NFET only)

MAX1795

ILIM

MAX1796

MAX1797

0.19

0.37

0.35

0.7

A

0.8

1.32

LX Leakage Current

ILEAK

VLX = 0 and +5.5V, VOUT = +5.5V

Damping Switch On-Resistance

RDAMP

100

Operating Current into OUT

(Note 2)

VFB = +1.4V

µA

400

Ω

45

µA

Operating Current into BATT

Shutdown Current into BATT

LX Switch Maximum On-Time

LX Switch Minimum Off-Time

LBI Threshold Voltage

LBI Input Current

LBO Low Output Voltage

tON

tOFF

VLBI

ILBI

VFB = +1.4V, VLBI = +1V

SHDN = BATT, VLBI = +1V

VFB = +1V, if current limit not reached

VFB = +1V

VBATT = +2V

VBATT = LBI

VLBI = +0.8V

VBATT = VLBI = +0.975V,

sinking 20µA (50Ω typ)

VBATT = VLBI = +1.1V,

sinking 100µA (25Ω typ)

2.75

0.7

0.8

0.875

4

µA

4

µA

5.25

µs

1.3

µs

0.90

V

0.975

100

nA

0.1

V

0.1

LBO Off-Leakage Current

SHDN Input Voltage

Shutdown Input Current

VLBO = +5.5V

VIL

VIH

VSHDN = 0 and +5.5V

0.8 x

VBATT

100

nA

0.2 x

VBATT

V

100

nA

Note 1: Operating Voltage: Since the regulator is bootstrapped to the output, once started it will operate down to a 0.7V input.

Note 2: Device is bootstrapped (power to IC comes from OUT). This correlates directly with the actual battery supply current.

Note 3: Specifications to -40°C are guaranteed by design, not production tested.

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