High-Frequency, Current-Mode PWM Controller

with Accurate Oscillator and Dual FET Drivers

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3

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

CS Input Bias Current

0

+2

µA

CS Blanking Time

70

ns

Propagation Delay from

Comparator Input to NDRV_

50mV overdrive

40

ns

IN CLAMP VOLTAGE

IN Clamp Voltage

IN sinking 2mA (Note 2)

24.0

26.0

29.0

V

ERROR AMPLIFIER (FB, COMP)

Voltage Gain

Ω to AGND

80

dB

Unity-Gain Bandwidth

BW

Ω to AGND,

5

MHz

Phase Margin

PM

Ω to AGND,

65

Degrees

FB Input Offset Voltage

3mV

High

2.6

3.8

COMP Clamp Voltage

Low

0.4

1.1

V

Error-Amplifier Output Current

Sinking or sourcing

0.5

mA

1.215

1.230

1.245

Reference Voltage

1.205

1.230

1.242

V

Input Bias Current

100

300

nA

COMP Short-Circuit Current

12

mA

THERMAL SHUTDOWN

Thermal-Shutdown Temperature

+170

°C

Thermal Hysteresis

25

°C

OSCILLATOR SYNC INPUT (MAX5069A/D only)

SYNC High-Level Voltage

2.4

V

SYNC Low-Level Voltage

0.4

V

SYNC Input Bias Current

10

nA

Maximum SYNC Frequency

3.125

MHz

SYNC High-Level Pulse Width

30

ns

SYNC Low-Level Pulse Width

30

ns

DIGITAL SOFT-START

Soft-Start Duration

(Note 5)

2047

Cycles

Reference-Voltage Step

9.7

mV

Reference-Voltage Steps During

Soft-Start

127

Steps

OSCILLATOR

Oscillator Frequency Range

50

2500

kHz

ELECTRICAL CHARACTERISTICS (continued)