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Electrical characteristics (continued) – Rainbow Electronics MAX5095A User Manual

Page 5

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MAX5094A/B/C/D/MAX5095A/B/C

High-Performance, Single-Ended, Current-Mode

PWM Controllers

_______________________________________________________________________________________

5

ELECTRICAL CHARACTERISTICS (continued)

(V

CC

= +15V, R

T

= 10k

Ω, C

T

= 3.3nF, REF = open, C

REF

= 0.1µF, COMP = open, V

FB

= 2V, CS = GND, T

A

= T

J

= -40°C to +125°C,

unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

CURRENT-SENSE AMPLIFIER

MAX5094A/MAX5094B

2.85

3

3.26

V/V

Gain (Notes 3, 4)

A

CS

MAX5094C/D, MAX5095_

2.85

3

3.40

V/V

MAX5094A/B (Note 3)

0.95

1

1.05

MAX5094C/MAX5094D (Note 3)

0.275

0.300

0.325

Maximum Current-Sense Signal

V

CS_MAX

V

COMP

= 5V, MAX5095_

0.275

0.300

0.325

V

Power-Supply Rejection Ratio

PSRR

12V

≤ V

CC

≤ 25V

70

dB

Input Bias Current

I

CS

V

COMP

= 0V

-1

-2.5

µA

Delay From CS to OUT

t

CS_DELAY

50mV overdrive

60

ns

MOSFET DRIVER

OUT Low-Side On-Resistance

V

RDS_ONL

I

SINK

= 200mA

4.5

12

OUT High-Side On-Resistance

V

RDS_ONH

I

SOURCE

= 100mA

3.5

9

I

SOURCE

(Peak)

I

SOURCE

C

OUT

= 10nF

2

A

I

SINK

(Peak)

I

SINK

C

OUT

= 10nF

1

A

Rise Time

t

R

C

OUT

= 1nF

15

ns

Fall Time

t

F

C

OUT

= 1nF

22

ns

UNDERVOLTAGE LOCKOUT/STARTUP

Startup Voltage Threshold

V

CC_START

7.98

8.4

8.82

V

Minimum Operating Voltage After
Turn-On

V

CC_MIN

7.1

7.6

8.0

V

Undervoltage-Lockout Hysteresis

UVLO

HYST

0.8

V

PWM

MAX5094A/MAX5094C/MAX5095A

94.5

96

97.5

Maximum Duty Cycle

D

MAX

MAX5094B/MAX5094D/MAX5095B/
MAX5095C

48

49.8

50

%

Minimum Duty Cycle

D

MIN

0

%

SUPPLY CURRENT

Startup Supply Current

I

START

V

CC

= 7.5V

32

65

µA

Operating Supply Current

I

CC

V

FB

= V

CS

= 0

3

5

mA

Zener Bias Voltage at V

CC

V

Z

I

CC

= 25mA

24

26.5

V

SYNCHRONIZATION (MAX5095A/MAX5095B only, Note 5)

SYNC Frequency Range

f

SYNC

20

1000

kHz

SYNC Clock Input High
Threshold

V

SYNCINH

3.5

V

SYNC Clock Input-Low Threshold

V

SYNCINL

0.8

V

SYNC Clock Input Minimum
Pulse Width

t

PW_SYNCIN

200

ns

SYNC Clock Output High Level

V

SYNCOH

1mA external pulldown

4.0

4.7

V

SYNC Clock Output Low Level

V

SYNCOL

R

SYNC

= 5k

0

0.1

V