CDMA Cellular/PCS System

Power Supplies

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

open; BP bypassed with 0.01µF, OUT1 bypassed with 4.7µF; OUT2, OUT3, OUT4, OUT5 bypassed with 2.2µF; OUT1–5 set to 2.98V,

45

Output Voltage Noise

Line Regulation

-0.15

-0.02

0.11

%/V

2.5V

0.6

Nominal Voltage Adjust Range

1.8

3.3

V

32 steps through serial interface; Tables 2, 3

°C

10

Hysteresis

°C

160

Threshold

µA

-1

1

DR1, DR2 OFF Current

(Leakage)

V

0.2

0.5

DR1, DR2 Output Low Level

k

Ω

9

14

19

RSO = 2.48V

RSO Reset Resistance

V

0.5

RSO Output High Level

(Internal Pullup Resistor)

V

0.5

RSO Output Low Level

V

0.5

ONO Output High Level

V

0.05

0.5

ONO Output Low Level

k

Ω

80

155

360

OFF = 5.5V

OFF Pulldown Resistance

V

0.4

SDA Output Low Level

(MAX1799 only)

V

1.6

Input High Level

V

0.4

Input Low Level

ms

35

60

110

Watchdog Timer

ms

140

235

430

Reset Timer

Ω

110

300

Regulator output turned off

Output-Discharge Switch

Resistance

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

1

Output Accuracy

(Line and Load)

-3

3

%

Dropout Voltage

50

100

mV

-2

2

Output Accuracy

%

CONDITIONS

1mA

2.5V

Load Regulation

-0.005

%/mA

Current Limit

160

250

500

mA

1mA

ms

175

295

540

OUT1 Shutdown Timer

(MAX1798A/MAX1799A only)

THERMAL SHUTDOWN

LOGIC AND CONTROL INPUTS (

ON, OFF, RSO, DIN (SDA), SCLK (SCK), CS (AS))

OUT2–5 REGULATORS