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MAX1714AEEP

High-Speed Step-Down Controller for Notebook Computers

Maxim Integrated 

High-Speed Step-Down Controller

for Notebook Computers

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, 4A components from Table 1, V+ = +15V, VCC = VDD = +5V, SKIP = AGND, TA = 0°C to +85°C, unless otherwise

noted.) (Note 1)

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Overvoltage Trip Threshold

With respect to error comparator threshold (MAX1714A only) 10.5 12.5 14.5

%

Overvoltage Fault Propagation

Delay

FB forced 2% above trip threshold (MAX1714A only)

1.5

µs

Output Undervoltage Protection

Threshold

With respect to error comparator threshold

65

70

75

%

Output Undervoltage Protection

Blanking Time

From SHDN signal going high

10

30

ms

Current-Limit Threshold

(Positive Direction, Fixed)

PGND - LX, ILIM = VCC

90

100

110

mV

Current-Limit Threshold

(Positive Direction, Adjustable)

Current-Limit Threshold

(Negative Direction)

PGND - LX

VILIM = 0.5V

VILIM = 2.0V

PGND - LX, SKIP = VCC, TA = +25°C,

with respect to positive current-limit threshold

40

50

60

mV

170

200

230

-90 -120 -140

%

Current-Limit Threshold

(Zero Crossing)

PGND - LX, SKIP = AGND

3

mV

PGOOD Propagation Delay

PGOOD Output Low Voltage

PGOOD Leakage Current

Thermal Shutdown Threshold

FB forced 2% below PGOOD trip threshold, falling edge

ISINK = 1mA

High state, forced to 5.5V

Hysteresis = 10°C

1.5

µs

0.4

V

1

µA

150

°C

VCC Undervoltage Lockout

Threshold

Rising edge, hysteresis = 20mV,

PWM disabled below this level

4.1

4.4

V

DH Gate-Driver On-Resistance BST - LX forced to 5V

1.5

5

Ω

DL Gate-Driver On-Resistance

(Pull-Up)

DL, high state

1.5

5

Ω

DL Gate-Driver On-Resistance

(Pull-Down)

DL, low state

0.5

1.7

Ω

DH Gate-Driver Source/Sink

Current

DH forced to 2.5V, BST - LX forced to 5V

1

A

DL Gate-Driver Source Current

DL Gate-Driver Sink Current

Dead Time

DL forced to 2.5V

DL forced to 2.5V

DL rising

DH rising

1

A

3

A

35

ns

26

SKIP Input Current Logic

Threshold

To disable overvoltage and undervoltage fault detection,

TA = +25°C

-1.5

-0.1

mA

PGOOD Trip Threshold

Logic Input High Voltage

Logic Input Low Voltage

Logic Input Current

ILIM Input Current

Measured at FB with respect to error comparator

threshold, falling edge

SHDN, SKIP

SHDN, SKIP

SHDN, SKIP

SHDN, SKIP

-8

-6

-4

%

2.4

V

0.8

V

-1

1

µA

±10

nA

_______________________________________________________________________________________ 3

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