MAX1636(1997) Ver la hoja de datos (PDF) - Maxim Integrated

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MAX1636
(Rev.:1997)

Low-Voltage, Precision Step-Down Controller for Portable CPU Power

Maxim Integrated 

Low-Voltage, Precision Step-Down

Controller for Portable CPU Power

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V+ = 15V, SYNC = VL = VCC, IVL = 0mA, IREF = 0mA, TA = 0°C to +85°C, unless otherwise noted. Typical values

are at TA = +25°C.)

PARAMETER

CONDITIONS

MIN TYP MAX

UNITS

Current-Sense Input

Leakage Current

CSH = CSL = 5V, V+ = VL = VCC =

GND, either CSH or CSL input

10

µA

Gate-Driver Sink/Source Current

Gate-Driver On-Resistance

DH or DL forced to 2V

High or low, DH or DL

1

A

7

Ω

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, V+ = 15V, SYNC = VL = VCC, IVL = 0mA, IREF = 0mA, TA =-40°C to +85°C, unless otherwise noted.) (Note 1)

PARAMETER

CONDITIONS

MIN TYP MAX

UNITS

SMPS CONTROLLER

Input Voltage Range, V+

Input source for VL regulator

4.5

30

V

Input Voltage Range, VL

Gate-driver supply rail

4.2

5.5

V

Input Voltage Range, VCC

Internal chip supply rail

3.15

5.5

V

Output Voltage, Adj Mode

FB tied to VOUT, 0mV < (CSH - CSL) < 80mV, 4.5V

< V+ < 30V (includes line and load regulation)

1.086

1.114

V

Output Voltage, Fixed 2.5V Mode

FB tied to VCC, 0mV < (CSH - CSL) < 80mV, 4.5V

< V+ < 30V (includes line and load regulation)

2.432

2.635

V

Output Voltage, Fixed 3.3V Mode

FB tied to GND, 0mV < (CSH - CSL) < 80mV, 4.5V

< V+ < 30V (includes line and load regulation)

Output Adjustment Range

Current-Limit Threshold

VCC = VL = 5V

VCC = 3.3V, VL = 5V

Positive direction

Power Consumption

VCC = 5V, output not switching

VCC = 3.3V, output not switching

INTERNAL VL REGULATOR AND REFERENCE

VCC = 5V, I(VL) = 0

Regulator Supply Current (V+)

VCC = 5V, I(VL) = 0, V+ = 4.5V

(includes PNP base current)

Standby Supply Current (V+)

VL Output Voltage

SHDN = GND, OVP = VCC

I(VL) = 0 to 25mA, 5V < V+ < 30V

I(VL) = 0 to 25mA, 6V < V+ < 30V

3.195

VREF

VREF

70

4.5

4.7

3.497

V

5.5

V

3.6

130

mV

2.0

mW

1.5

60

µA

500

60

µA

5.3

V

5.3

VL Undervoltage Lockout

Threshold

Rising edge, hysteresis = 25mV

3.45

3.91

V

4 _______________________________________________________________________________________

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