Rainbow Electronics MAX5095A User Manual

General Description

The MAX5094A/B/C/D/MAX5095A/B/C BiCMOS, high­performance, current-mode PWM controllers have all the
features required for wide input-voltage range
isolated/nonisolated power supplies. These controllers
are used for low- and high-power universal input volt­age and telecom power supplies.

The MAX5094/MAX5095 contain a fast comparator with
only 60ns typical delay from current sense to the output
for overcurrent protection. The MAX5094 has an inte­grated error amplifier with the output at COMP. Soft­start is achieved by controlling the COMP voltage rise
using external components.

The oscillator frequency is adjustable from 20kHz to
1MHz with an external resistor and capacitor. The tim­ing capacitor discharge current is trimmed allowing for
programmable dead time and maximum duty cycle for
a given frequency. The available saw-toothed waveform
at RTCTcan be used for slope compensation when
needed.

The MAX5095A/MAX5095B include a bidirectional syn­chronization circuit allowing for multiple controllers to
run at the same frequency to avoid beat frequencies.
Synchronization is accomplished by simply connecting
the SYNC of all devices together. When synchronizing
with other devices, the MAX5095A/MAX5095B with the
highest frequency synchronizes the other devices.
Alternatively, the MAX5095A/MAX5095B can be syn­chronized to an external clock with an open-drain out­put stage running at a higher frequency.

The MAX5095C provides a clock output pulse
(ADV_CLK) that leads the driver output (OUT) by
110ns. The advanced clock signal is used to drive the
secondary-side synchronous rectifiers.

The MAX5094A/B/C are available in the 8-pin SO and
8-pin µMAX®packages. The MAX5094D and
MAX5095A/B/C are available in the 8-pin µMAX pack­age. All devices operate over the automotive tempera­ture range of -40°C to +125°C.

Applications

Universal Input AC/DC Power Supplies

Isolated Telecom Power Supplies

Isolated Power-Supply Modules

Networking Systems

Computer Systems/Servers

Industrial Power Conversion

Isolated Keep-Alive Circuits

Features

♦ Pin-for-Pin Replacement for UCC28C43

(MAX5094A) and UCC28C45 (MAX5094B)

♦ 2A Drive Source and 1A Sink Capability

♦ Up to 1MHz Switching Frequency Operation

♦ Bidirectional Frequency Synchronization

(MAX5095A/MAX5095B)

♦ Advanced Output Drive for Secondary-Side

Synchronous Rectification (MAX5095C)

♦ Fast 60ns Cycle-by-Cycle Current Limit

♦ Trimmed Oscillator Capacitor Discharge Current

Sets Maximum Duty Cycle Accurately

♦ Accurate ±5% Start Voltage with 0.8V Hysteresis

♦ Low 32µA Startup Current

♦ 5V Regulator Output (REF) with 20mA Capability

♦ Versions with 0.3V Current-Sense Threshold

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

High-Performance, Single-Ended, Current-Mode

PWM Controllers

________________________________________________________________ Maxim Integrated Products 1

OUT

GNDR

T/CT

1

2

87REF

V

CC

FB

CS

COMP

µMAX/SO

TOP VIEW

3

4

6

5

MAX5094

Pin Configurations

Ordering Information

19-3864; Rev 0; 10/05

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP RANGE

PIN-

PKG

CODE

MAX5094AASA

8 SO S8-4

MAX5094AAUA

8 µMAX U8-1

MAX5094BASA*

8 SO S8-4

MAX5094BAUA*

8 µMAX U8-1

MAX5094CASA*

8 SO S8-4

MAX5094CAUA*

8 µMAX U8-1

MAX5094DAUA*

8 µMAX U8-1

MAX5095AAUA

8 µMAX U8-1

MAX5095BAUA*

8 µMAX U8-1

MAX5095CAUA*

8 µMAX U8-1

Pin Configurations continued at end of data sheet.

µMAX is a registered trademark of Maxim Integrated Products, Inc.

*Future product—contact factory for availability.

Ordering Information continued at end of data sheet.

PACKAGE

-40°C to +125°C

-40°C to +125°C

-40°C to +125°C

-40°C to +125°C

-40°C to +125°C

-40°C to +125°C

-40°C to +125°C

-40°C to +125°C

-40°C to +125°C

-40°C to +125°C

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

High-Performance, Single-Ended, Current-Mode
PWM Controllers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +15V, RT= 10kΩ, CT= 3.3nF, REF = open, C

REF

= 0.1µF, COMP = open, VFB= 2V, CS = GND, TA= TJ= -40°C to +85°C,

unless otherwise noted.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

VCC(Low-Impedance Source) to GND ..................-0.3V to +30V

V

CC(ICC

< 30mA).....................................................Self Limiting

OUT to GND ...............................................-0.3V to (V

CC

+ 0.3V)

OUT Current.............................................................±1A for 10µs

FB, SYNC, COMP, CS, R

T/CT

, REF to GND .............-0.3V to +6V

COMP Sink Current (MAX5094)..........................................10mA

Continuous Power Dissipation (T

A

= +70°C)

8-Pin µMAX (derate 4.5mW/°C above +70°C) .............362mW

8-Pin SO (derate 5.9mW/°C above +70°C)...............470.6mW

Operating Temperature Range .........................-40°C to +125°C

Maximum Junction Temperature .....................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS

UNITS

REFERENCE

Output Voltage V

REF

TA = +25°C, I

REF

= 1mA

V

Line Regulation ∆V

LINE

12V ≤ V

CC

≤ 25V, I

REF

= 1mA 0.4 4 mV

Load Regulation ∆V

LOAD

1mA ≤ I

REF

≤ 20mA 6 25 mV

Total Output Variation V

REFT

1mA ≤ I

REF

≤ 20mA, 12V ≤ V

CC

≤ 25V 4.9 5.1 V

Reference Output-Noise Voltage

V

NOISE

10Hz ≤ f ≤ 10kHz, TA = +25°C 50 µV

Reference Output Short Circuit I

S_SC

V

REF =

0 -30

mA

OSCILLATOR

Initial Accuracy TA = +25°C 51 54 57 kHz
Voltage Stability 12V ≤ VCC ≤ 25V 0.2 0.5 %
Temp Stability -40°C ≤ TA ≤ +85°C 0.5 %

RT/CT Voltage Ramp (

P-P

)V

RAMP

1.7 V

RT/CT Voltage Ramp Valley

1.1 V

V

RT/CT

= 2V, TA = +25°C 7.9 8.3 8.7

Discharge Current I

DIS

V

RT/CT

= 2V, -40°C ≤ TA ≤ +85°C 7.5 8.3 9.0

mA

Frequency Range f

OSC

20

kHz

ERROR AMPLIFIER (MAX5094)

FB Input Voltage V

FB

FB shorted to COMP

2.5

V

FB Input Bias Current I

B(FB)

µA

Open-Loop Voltage Gain A

VOL

2V ≤ V

COMP

≤ 4V

dB

Unity-Gain Bandwidth f

GBW

1

MHz

Power-Supply Rejection Ratio PSRR 12V ≤ VCC ≤ 25V (Note 2) 60 80 dB

COMP Sink Current I

SINK

VFB = 2.7V, V

COMP

= 1.1V 2 6 mA

COMP Source Current I

SOURCE

VFB = 2.3V, V

COMP

= 5V

mA

COMP Output High Voltage V

COMPH

VFB = 2.3V, R

COMP

= 15kΩ to GND 5 5.8 V

COMP Output Low Voltage V

COMPL

VFB = 2.7V, R

COMP

= 15kΩ to REF 0.1 1.1 V

CURRENT-SENSE AMPLIFIER

(MAX5094A/MAX5094B)

3

V/V

Gain (Notes 3, 4) A

CS

(MAX5094C/D, MAX5095_)

3

V/V

MIN TYP MAX

4.950 5.000 5.050

-100 -180

V

RAMP_VALLEY

2.465

-0.01 -0.1

100

-0.5 -1.2 -1.8

2.85

2.85

1000

2.535

3.26

3.40

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

High-Performance, Single-Ended, Current-Mode

PWM Controllers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +15V, RT= 10kΩ, CT= 3.3nF, REF = open, C

REF

= 0.1µF, COMP = open, VFB= 2V, CS = GND, TA= TJ= -40°C to +85°C,

unless otherwise noted.) (Note 1)

PARAMETER SYMBOL CONDITIONS

UNITS

MAX5094A/B (Note 3)

1

MAX5094C/MAX5094D (Note 3)

0.3

Maximum Current-Sense Signal V

CS_MAX

V

COMP

= 5V, MAX5095

0.3

V

Power-Supply Rejection Ratio PSRR 12V ≤ VCC ≤ 25V 70 dB

Input Bias Current I

CS

V

COMP

= 0V -1

µA

Delay From CS to OUT

50mV overdrive 60 ns

MOSFET DRIVER

OUT Low-Side On-Resistance

I

SINK

= 200mA 4.5 10 Ω

OUT High-Side On-Resistance

I

SOURCE

= 100mA 3.5 7 Ω

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

Minimum Operating Voltage After
Turn-On

V

CC_MIN

7.1 7.6 8.0 V

Undervoltage-Lockout Hysteresis

0.8 V

PWM

MAX5094A/MAX5094C/MAX5095A

96

Maximum Duty Cycle D

MAX

MAX5094B/MAX5094D/MAX5095B/
MAX5095C

48

50

%

Minimum Duty Cycle D

MIN

0%

SUPPLY CURRENT

Startup Supply Current I

START

VCC = 7.5V 32 65 µA

Operating Supply Current I

CC

VFB = VCS = 0 3 5 mA

Zener Bias Voltage at V

CC

V

Z

ICC = 25mA 24

V

SYNCHRONIZATION (MAX5095A/MAX5095B only) (Note 5)

SYNC Frequency Range f

SYNC

20

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

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

= 5kΩ 0 0.1 V

SYNC Leakage Current I

SYNC

V

SYNC

= 0

0.1 µA

t

CS_DELAY

V

RDS_ONL

V

RDS_ONH

V

CC_START

UVLO

HYST

t

PW_SYNCIN

MIN TYP MAX

0.95

0.275

0.275

7.98 8.40 8.82

94.5

49.8

26.5

200

0.01

1.05

0.325

0.325

-2.5

97.5

1000

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

High-Performance, Single-Ended, Current-Mode
PWM Controllers

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +15V, RT= 10kΩ, CT= 3.3nF, REF = open, C

REF

= 0.1µF, COMP = open, VFB= 2V, CS = GND, TA= TJ= -40°C to +85°C,

unless otherwise noted.) (Note 1)

PARAMETER SYMBOL CONDITIONS

UNITS

ADV_CLK (MAX5095C only)

ADV_CLK High Voltage

I

ADV_CLK

= 10mA source 2.4 3 V

ADV_CLK Low Voltage

I

ADV_CLK

= 10mA sink 0.4 V

ADV_CLK Output Pulse Width t

PULSE

85 ns

ADV_CLK Rising Edge to OUT
Rising Edge

t

ADV_CLK

ns

ADV_CLK Source and Sink
Current

I

ADV_CLK

10 mA

ELECTRICAL CHARACTERISTICS

(VCC= +15V, RT= 10kΩ, CT= 3.3nF, REF = open, C

REF

= 0.1µF, COMP = open, VFB= 2V, CS = GND, TA= TJ= -40°C to +125°C,

unless otherwise noted.) (Note 1)

PARAMETER SYMBOL CONDITIONS

UNITS

REFERENCE

Output Voltage V

REF

TA = +25°C, I

REF

= 1mA

V

Line Regulation ∆V

LINE

12V ≤ V

CC

≤ 25V, I

REF

= 1mA 0.4 4 mV

Load Regulation ∆V

LOAD

1mA ≤ I

REF

≤ 20mA 6 25 mV

Total Output Variation V

REFT

1mA ≤ I

REF

≤ 20mA, 12V ≤ V

CC

≤ 25V 4.9 5.1 V

Reference Output-Noise Voltage

V

NOISE

10Hz ≤ f ≤ 10kHz, TA = +25°C 50 µV

Reference Output Short Circuit I

S_SC

V

REF

= 0 -30

mA

OSCILLATOR

Initial Accuracy TA = +25°C 51 54 57 kHz
Voltage Stability 12V ≤ VCC ≤ 25V 0.2 0.5 %
Temp Stability -40°C ≤ TA ≤ +125°C 1 %

RT/CT Voltage Ramp (

P-P

)V

RAMP

1.7 V

RT/CT Voltage Ramp Valley

1.1 V

V

RT/CT

= 2V, TA = +25°C 7.9 8.3 8.7

Discharge Current I

DIS

V

RT/CT

= 2V, -40°C ≤ TA ≤ +125°C 7.5 8.3 9.0

mA

Frequency Range f

OSC

20

kHz

ERROR AMPLIFIER (MAX5094)

FB Input Voltage V

FB

FB shorted to COMP

2.5

V

FB Input Bias Current I

B(FB)

µA

Open-Loop Voltage Gain A

VOL

2V ≤ V

COMP

≤ 4V

dB

Unity-Gain Bandwidth f

GBW

1

MHz

Power-Supply Rejection Ratio PSRR 12V ≤ VCC ≤ 25V (Note 2) 60 80 dB

COMP Sink Current I

SINK

V

FB

= 2.7V, V

COMP

= 1.1V 2 6 mA

COMP Source Current I

SOURCE

V

FB

= 2.3V, V

COMP

= 5V

mA

COMP Output High Voltage V

COMPH

V

FB

= 2.3V, R

COMP

=15kΩ to GND 5 5.8 V

COMP Output Low Voltage V

COMPL

V

FB

= 2.7V, R

COMP

= 15kΩ to REF 0.1 1.1 V

V

ADV_CLKH

V

ADV_CLKL

MIN TYP MAX

110

MIN TYP MAX

4.950 5.000 5.050

V

RAMP_VALLEY

-100 -180

2.465

-0.01 -0.1

100

-0.5 -1.2 -1.8

1000

2.535

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

High-Performance, Single-Ended, Current-Mode

PWM Controllers

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +15V, RT= 10kΩ, CT= 3.3nF, REF = open, C

REF

= 0.1µF, COMP = open, VFB= 2V, CS = GND, TA= TJ= -40°C to +125°C,

unless otherwise noted.) (Note 1)

PARAMETER SYMBOL CONDITIONS

UNITS

CURRENT-SENSE AMPLIFIER

MAX5094A/MAX5094B

3

V/V

Gain (Notes 3, 4) A

CS

MAX5094C/D, MAX5095_

3

V/V

MAX5094A/B (Note 3)

1

MAX5094C/MAX5094D (Note 3)

Maximum Current-Sense Signal V

CS_MAX

V

COMP

= 5V, MAX5095_

V

Power-Supply Rejection Ratio PSRR 12V ≤ VCC ≤ 25V 70 dB

Input Bias Current I

CS

V

COMP

= 0V -1

µA

Delay From CS to OUT

50mV overdrive 60 ns

MOSFET DRIVER

OUT Low-Side On-Resistance

I

SINK

= 200mA 4.5 12 Ω

OUT High-Side On-Resistance

I

SOURCE

= 100mA 3.5 9 Ω

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

8.4

V

Minimum Operating Voltage After
Turn-On

V

CC_MIN

7.1 7.6 8.0 V

Undervoltage-Lockout Hysteresis

0.8 V

PWM

MAX5094A/MAX5094C/MAX5095A

96

Maximum Duty Cycle D

MAX MAX5094B/MAX5094D/MAX5095B/

MAX5095C

48

50

%

Minimum Duty Cycle D

MIN

0%

SUPPLY CURRENT

Startup Supply Current I

START

VCC = 7.5V 32 65 µA

Operating Supply Current I

CC

VFB = VCS = 0 3 5 mA

Zener Bias Voltage at V

CC

V

Z

ICC = 25mA 24

V

SYNCHRONIZATION (MAX5095A/MAX5095B only, Note 5)

SYNC Frequency Range f

SYNC

20

kHz

SYNC Clock Input High
Threshold

3.5 V

SYNC Clock Input-Low Threshold

V

SYNCINL

0.8 V

SYNC Clock Input Minimum
Pulse Width

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

= 5kΩ 0 0.1 V

t

CS_DELAY

V

RDS_ONL

V

RDS_ONH

V

CC_START

UVLO

HYST

V

SYNCINH

t

PW_SYNCIN

MIN TYP MAX

2.85

2.85

0.95

0.275 0.300 0.325

0.275 0.300 0.325

7.98

94.5

49.8

26.5

200

3.26

3.40

1.05

-2.5

8.82

97.5

1000

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

High-Performance, Single-Ended, Current-Mode
PWM Controllers

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +15V, RT= 10kΩ, CT= 3.3nF, REF = open, C

REF

= 0.1µF, COMP = open, VFB= 2V, CS = GND, TA= TJ= -40°C to +125°C,

unless otherwise noted.) (Note 1)

PARAMETER SYMBOL CONDITIONS

UNITS

SYNC Leakage Current I

SYNC

V

SYNC

= 0

0.1 µA

ADV_CLK (MAX5095C only)

ADV_CLK High Voltage

I

ADV_CLK

= 10mA source 2.4 3 V

ADV_CLK Low Voltage

I

ADV_CLK

= 10mA sink 0.4 V

ADV_CLK Output Pulse Width t

PULSE

85 ns

ADV_CLK Rising Edge to OUT
Rising Edge

t

ADV_CLK

ns

ADV_CLK Source and Sink
Current

I

ADV_CLK

10 mA

Note 1:All devices are 100% tested at +25°C. All limits over temperature are guaranteed by design, not production tested.
Note 2: Guaranteed by design, not production tested.
Note 3: Parameter measured at trip point of latch with V

FB

= 0 (MAX5094 only).

Note 4: Gain is defined as A = ∆V

COMP

/ ∆VCS, 0 ≤ VCS≤ 0.8V for MAX5094A/MAX5094B, 0 ≤ VCS≤ 0.2V for

MAX5094C/MAX5094D/ MAX5095_.

Note 5: Output frequency equals oscillator frequency for MAX5094A/MAX5094C/MAX5095A. Output frequency is one-half oscillator

frequency for MAX5094B/MAX5094D/MAX5095B/MAX5095C.

Typical Operating Characteristics

(VCC= 15V, TA = +25°C, unless otherwise noted.)

BOOTSTRAP UVLO vs. TEMPERATURE

MAX5094/95 toc01

TEMPERATURE (°C)

V

CC

(V)

1109565 80-10 5 20 35 50-25

0

1

2

3

4

5

6

7

8

9

10

-40 125

VCC RISING

VCC FALLING

HYSTERESIS

25

27

39

31

29

33

35

37

41

-40 -10 5 20-25 35 50 9580 11065 125

START-UP CURRENT

vs. TEMPERATURE

MAX5094/95 toc02

TEMPERATURE (°C)

I

CC

(µA)

VCC = 7.5V

3.5

3.7

4.9

4.1

3.9

4.3

4.5

4.7

5.1

OPERATING SUPPLY CURRENT

vs. TEMPERATURE AFTER STARTUP

(f

OSC

= fSW = 300kHz)

MAX5094/95 toc03

I

CC

(mA)

-40 -10 5 20-25 35 50 9580 11065 125

TEMPERATURE (°C)

CT = 560pF

MAX5094A/MAX5094C/MAX5095A

V

ADV_CLKH

V

ADV_CLKL

MIN TYP MAX

0.01

110

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

High-Performance, Single-Ended, Current-Mode

PWM Controllers

_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

(VCC= 15V, TA = +25°C, unless otherwise noted.)

4.90

4.94

4.92

5.00

4.98

4.96

5.02

5.04

5.06

5.08

REFERENCE VOLTAGE

vs. TEMPERATURE

MAX5094/95 toc04

V

REF

(V)

-40 -10 5 20-25 35 50 9580 11065 125

TEMPERATURE (°C)

I

REF

= 1mA

I

REF

= 20mA

4.65

4.75

4.70

4.85

4.80

5.00

4.95

4.90

5.05

02010 30 40 50 60 70

REFERENCE VOLTAGE

vs. REFERENCE LOAD CURRENT

MAX5094/95 toc05

I

REF

(mA)

V

REF

(V)

4.980

4.984

4.982

4.988

4.986

4.992

4.990

4.994

4.998

4.996

5.000

10 14 1612 18 20 22 24 26

REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE

MAX5094/95 toc06

VCC (V)

V

REF

(V)

I

REF

= 1mA

450

470

460

500

490

480

510

520

540

530

550

-40 -10 5-25 20 3550658095110125

OSCILLATOR FREQUENCY (f

OSC

)

vs. TEMPERATURE

MAX5094/95 toc07

TEMPERATURE (°C)

OSCILLATOR FREQUENCY (kHz)

RT = 3.65kΩ
C

T

= 560pF

7.88

7.90

8.02

7.94

7.92

7.96

7.98

8.00

8.04

-40 -10 5 20-25 35 50 9580 11065 125

OSCILLATOR RT/CT DISCHARGE CURRENT

vs. TEMPERATURE

MAX5094/95 toc08

TEMPERATURE (°C)

R

T

/C

T

DISCHARGE CURRENT (mA)

V

RT/CT

= 2V

0

20

10

50

40

30

60

70

90

80

100

MAXIMUM DUTY CYCLE

vs. TEMPERATURE

MAX5094/95 toc09

DUTY CYCLE (%)

MAX5094A/MAX5094C/MAX5095A

-40 -10 5 20-25 35 50 9580 11065 125

TEMPERATURE (°C)

MAX5094B/MAX5094D/MAX5095B/MAX5095C

RT = 5kΩ
C

T

= 560pF

0 1000 1500500 2000 2500 3000 3500 4000

MAXIMUM DUTY CYCLE vs. FREQUENCY

MAX5094A/MAX5094C/MAX5095A

MAX5094/95 toc10

OSCILLATOR FREQUENCY (kHz)

CT = 100pF

CT = 220pF

CT = 560pF

CT = 1000pF

0

20

10

50

40

30

60

70

90

80

100

DUTY CYCLE (%)

0.90

0.94

0.92

1.00

0.98

0.96

1.02

1.04

1.08

1.06

1.10

CURRENT-SENSE TRIP THRESHOLD

vs. TEMPERATURE

MAX5094/95 toc11a

CS THRESHOLD (V)

MAX5094A/MAX5094B

-40 -10 5 20-25 35 50 9580 11065 125

TEMPERATURE (°C)

VFB = 0V

0.20

0.24

0.22

0.30

0.28

0.26

0.32

0.34

0.38

0.36

0.40

CURRENT-SENSE TRIP THRESHOLD

vs. TEMPERATURE

MAX5094/95 toc11b

CS THRESHOLD (V)

-40 -10 5 20-25 35 50 9580 11065 125

TEMPERATURE (°C)

MAX5094C/D: VFB = 0V
MAX5095_: V

COMP

= 5V