Step-Up DC-DC Converters with

Precise, Adaptive Current Limit for GSM

2

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

IN, ON, LX1, CHG, LIM, FB, OUT, REF to GND .......-0.3V to +7V

LX2 to GND ..............................................................-0.3V to +8V

IN, LX1 Average Current..........................................................1A

TSSOP (derate 5.7mW/°C above +70°C) ....................457mW

SO (derate 5.88mW/°C above +70°C) .........................471mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10sec) ............................+300° C

IN rising, 1% hysteresis

CONDITIONS

0.744

0.8

0.856

Peak Current

V

6

Output Voltage Range

V

2.4

2.5

2.6

V

2.7

6

Input Voltage Range

Input Undervoltage Lockout

µA

60

110

mmho

0.18

0.2

0.22

FB Transconductance

V

1.212

1.250

1.288

FB Set Voltage

V

1.225

1.25

1.275

Reference Voltage

mA

24

Input Supply Current

µA

310

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

Ω

0.3

0.7

P-Channel On-Resistance

Ω

0.1

0.18

Sense Resistor

mA

170

200

230

A

0.46

0.5

0.54

Ripple Current

Ω

0.4

0.8

N-Channel On-Resistance

2

0.02

0.1

0.02

0.1

V

0.6

V

1.8

ON Input Low Voltage

1.5

0.05

0.2

Input Current

µA

0.05

10

Ω

30

70

Precharge On-Resistance

LX2 Leakage Current

ms

0.7

1.2

1.8

Shutdown Delay

ON Input High Voltage

µA