MAX1715EEI(2000) Просмотр технического описания (PDF) - Maxim Integrated

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MAX1715EEI
(Rev.:2000)

Ultra-High Efficiency, Dual Step-Down Controller for Notebook Computers

Maxim Integrated 

Ultra-High Efficiency, Dual Step-Down

Controller for Notebook Computers

ELECTRICAL CHARACTERISTICS (continued)

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

noted.) (Note 1)

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Minimum Off-Time

(Note 3)

400

500

ns

Quiescent Battery Current (V+)

25

70

µA

Quiescent Supply Current

(VCC + VDD)

FB1 and FB2 forced above the regulation point

1100 1600 µA

Shutdown Supply Current

(VCC + VDD)

ON1 = ON2 = 0

<1

5

µA

Shutdown Supply Current (V+) ON1 = ON2 = 0

<1

5

µA

Reference Voltage

No external REF load

1.98

2

2.02

V

Reference Load Regulation

REF Sink Current

IREF = 0 to 50µA

REF in regulation

2

0.01

V

10

µA

REF Fault Lockout Voltage

Falling edge, hysteresis = 40mV

1.6

V

Overvoltage Trip Threshold

With respect to error comparator threshold

8.5

10.5

13

%

Overvoltage Fault Propagation

Delay

FB_ forced 2% above trip threshold

1.5

µs

Output Undervoltage Threshold With respect to error comparator threshold

60

70

80

%

Output Undervoltage Lockout

Time

From ON_ signal going high

10

20

30

ms

Current-Limit Threshold

(Positive Direction, Fixed)

PGND - LX_, ILIM = VCC

75

100

125

mV

Current-Limit Threshold

(Positive Direction, Adjusted)

PGND - LX_, ILIM resistor = 100kΩ

PGND - LX_, ILIM resistor = 400kΩ

40

50

60

mV

160

200

240

Current-Limit Threshold

(Negative Direction)

PGND - LX_, TA = +25°C, ILIM = VCC

-145 -120

-95

mV

Current-Limit Threshold, Zero

Crossing

PGND - LX_, SKIP = AGND

-5

3

10

mV

Thermal Shutdown Threshold

VCC Undervoltage Lockout

Threshold

DH Gate Driver On-Resistance

DL Gate Driver On-Resistance

(pull-up)

DL Gate Driver On-Resistance

(pull-down)

Hysteresis = 10°C

Rising edge, hysteresis = 20mV, PWM disabled below

this level

BST - LX forced to 5V

DL, high state

DL, low state

150

°C

4.1

4.4

V

1.5

5

Ω

1.5

5

Ω

0.6

2.5

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

Logic Input High Voltage

Logic Input Low Voltage

DL forced to 2.5V

DL forced to 2.5V

DL rising

DH rising

ON_, SKIP

ON_, SKIP

1

A

3

A

35

ns

26

2.4

V

0.8

V

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