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MAX8732A

High-Efficiency, Quad-Output, Main Power-Supply Controllers for Notebook Computers

Maxim Integrated 

High-Efficiency, Quad-Output, Main Power-

Supply Controllers for Notebook Computers

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF, V+ = 12.0.V, ON3 = ON5 = VCC, V SHDN = 5V,

TA = -40°C to +85°C, unless otherwise noted.) (Note 1)

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

LDO5 Bootstrap Switch Threshold Falling edge of OUT5, rising edge at OUT5 regulation

4.43

point

4.69

V

LDO5 Bootstrap Switch

Resistance

LDO5 to OUT5, VOUT5 = 5V

3.2

Ω

LDO3 Output Voltage

ON3 = ON5 = GND, 6V < V+ < 24V, 0 < ILDO3 < 100mA 3.27

LDO3 Bootstrap Switch Threshold Falling edge of OUT3, rising edge at OUT3 regulation

2.80

point

3.43

V

3.02

V

LDO3 Bootstrap

Switch Resistance

LDO3 to OUT3, VOUT3 = 3.2V

3.5

Ω

REF Output Voltage

REF Load Regulation

REF Sink Current

V+ Operating Supply Current

V+ Standby Supply Current

V+ Shutdown Supply Current

Quiescent Power Consumption

FAULT DETECTION

Overvoltage Trip Threshold

No external load

0 < ILOAD < 50µA

REF in regulation

LDO5 switched over to OUT5, 5V SMPS

V+ = 6V to 24V, both SMPSs off, includes ISHDN

V+ = 4.5V to 24V

Both SMPSs on, FB3 = FB5 = SKIP = GND, VOUT3 =

3.5V, VOUT5 = 5.3V

FB3 or FB5 with respect to nominal regulation point

1.975

10

+8

2.025

V

10

mV

µA

50

µA

300

µA

15

µA

4.5

mW

+14

%

PGOOD Threshold

FB3 or FB5 with respect to nominal output, falling edge,

typical hysteresis = 1%

-12

-7

%

PGOOD Output Low Voltage

PGOOD Leakage Current

ISINK = 4mA

High state, forced to 5.5V

0.3

V

1

µA

Output Undervoltage Shutdown

Threshold

FB3 or FB5 with respect to nominal output voltage

65

75

%

Output Undervoltage Shutdown

Blanking Time

INPUTS AND OUTPUTS

Feedback Input Leakage Current

PRO Input Voltage

SKIP Input Voltage

TON Input Voltage

From ON_ signal

VFB3 = VFB5 = 2.2V

Low level

High level

Low level

Float level

High level

Low level

High level

10

-200

1.5

1.7

2.4

2.4

40

ms

+200

nA

0.6

V

0.8

2.3

V

0.8

V

6 _______________________________________________________________________________________

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