LINEAR TECHNOLOGY LT4250, LTC4252C, LTC4261, LT4256, LTC4260 Technical data

High Voltage Hot Swap Controllers

VI-J30-CY

µ

LT4250: –48V Hot Swap™ Controller with Circuit Breaker

–48V RTN

(SHORT PIN)

–48V RTN

549k

UV = 38.5V

OV = 71V

–48V

* DIODES INC. SMAT70A

1%

6.49k
1%

10k

1%

*

R4

V

DD

UV

R5

OV

R6

V

EE

R1

0.02
5%

LT4250H PWRGD

SENSE

C1
470nF
25V

GATE DRAIN

R3

1k, 5%

R2
10

C2

5%

15nF
100V

Q1

IRF530

C3

0.1µF
100V

100µF

100V

C4

4250 F06a

VICOR

+

VI-J30-CY

+

V

IN

GATE IN

–

V

IN

V

OUT

V

OUT

LTC4252C: –48V Hot Swap Controller with Active Current Limit

n

Very High Voltage Floating Topology

n

Adjustable Analog Current Limit with
Circuit Breaker Timer

n

Fast Response Time Limits
Peak Fault Current

n

Adjustable Soft-Start Current Limit

n

Adjustable Timer with Drain Voltage
Accelerated Response

n

Adjustable 1% Accurate Undervoltage and
Overvoltage Protection

n

LTC®4252C-1: Latchoff After Fault

n

LTC4252C-2: Auto-Retry After Fault

LTC4261: –48V Hot Swap Controller with I

–48V RTN

–48V RTN

(SHORT PIN)

R1

402k

1%

R2

32.4k
1%

–48V

* M0C207

2

C Control and Monitoring

C1
10nF

C

T

0.33µF

+

–

5V

+

C5
100µF
16V

V

LTC4252C-1

OV

UV

TIMER GATE

V

C

SS

68nF

n

Circuit Breaker Immunity to
Voltage Steps and Current Spikes

n

Adjustable Inrush and
Short-Circuit Current Limits

n

Adjustable Undervoltage and
Overvoltage Protection

n

Power Good Control Output

n

Operation Up to 80V

n

Pin-Compatible Upgrade to LT®1640

n

LT4250L: PWRGD Output

n

LT4250H: PWRGD Output

R

IN

3× 1.8k IN SERIES
1/4W EACH

C

IN

R3

1µF

RD 1M

5.1k

R
10Ω

C

*

C

C

18nF

4252-1/2 TA01

EE

IN

PWRGD

DRAIN

SENSESS

+

C

L

100µF

V

OUT

Q1
IRF530S

R

S

0.02Ω

LOAD

EN

–48V RTN

15.8k

11.5k

–48V

432k

1%

1%

1%

n

R

IN

R3

INTV

CC

LTC4261

VEESENSE

R

S

0.02Ω
5%

C

VCC

0.1µF

UVL
UVH
ADIN2
OV
ADR1
ADR0

R6

10k 1%

R2

R1

C

IN

1µF

6 × 0.51k IN SERIES
1/4W EACH

R4

V

IN

SDAI

SCL

SDAO

ADIN

GATE

Q1

IRF1310NS

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered
trademarks and Hot Swap is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.

7.5k

ANODE

CATHODE

HCPL-0300

V

OUT

R7

402k 1%

V

GND

CC

R

D

L

IN

V

OUT

MICRO-

CONTROLLER

5V

V

DD

4261 F17

Very High Voltage
Floating Topology

n

Independently Adjustable
Inrush and Overcurrent Limits

n

Controlled Soft-Start Inrush

n

10-Bit ADC Monitors

C

L

Current and Voltage

330µF
100V

n

Alert After Faults

n

Sequenced Power Good Outputs

n

Adjustable Undervoltage and
Overvoltage Protection

n

Adjustable Latchoff or
Auto-Retry After Fault

www.linear.com/hvhotswap

LT4256: +48V Hot Swap Controller with Active Current Limit

Part Number

Description

Comments

V

UV

TIMER

0.02

SENSE

CC

LT4256-1/

LT4256-2

GND

GATE

FB

PWRGD

n

Adjustable Analog Current Limit with
Circuit Breaker Timer

n

100V Absolute Maximum Rating

n

Foldback Current Limiting

n

Undervoltage Protection

n

LT4256-1: Latchoff After Fault

n

LT4256-2: Auto-Retry After Fault

n

LT4256-3: Open-Circuit Detect

V

48V

GND

IN

SMAT70A

(SHORT PIN)

64.9k

0.1µF

8.06k

33nF

LTC4260: +48V Hot Swap Controller with I2C Control and Monitoring

0.0107

48V

SDA

SCL

ALERT

CONNECTOR 2

*

CONNECTOR 1

0.1µF

49.9k

1.74k

2.67k

UV
OV
SDAO
SDAI
SCL

ALERT

ON

V

INTV

DD

CC

FDB3632

10Ω

6.8nF

SENSE

GATE

LTC4260

TIMER GND

+

100k

SOURCE

FB

BD_PRST

ADIN

GPIO

V

OUT

48V

C

L

43.5k

3.57k

24k

IRF530

CMPZ5241B
11V

10

10nF

100

UV = 36V
PWRGD = 40V

n

I2C/SMBus Interface

n

8-Bit ADC Monitors Current and Voltage

n

Alert Host After Faults

n

Adjustable Analog Current Limit with

36.5k

4.02k

4256 TA01

27k

PWRGD

C

L

Circuit Breaker Timer

n

100V Absolute Maximum Rating

n

Foldback Current Limiting

n

Undervoltage and Overvoltage Protection

n

Optional Latchoff or Auto-Retry After Faults

V
48V
2A

OUT

GND

BACKPLANE PLUG-IN

*DIODES INC. SMBT70A

CARD

0.1µF

-

68nF

4260 TA01

High Voltage Hot Swap Controller Selection Guide

Part Number

LT1640A Negative Hot Swap Controller in SO-8 Fast Circuit Breaker

LT4250 Negative Hot Swap Controller in SO-8 Circuit Breaker Immunity to Voltage Steps and Current Spikes

LTC4251B

LTC4252B/C

LTC4253B

LTC4261 Negative Hot Swap with I2C Interface Active Current Limit, Monitors Current and Voltage

LT1641 Positive Hot Swap Controller Foldback Current Limit, Auto-Retry/Latchoff

LT4254 Positive Hot Swap Controller Foldback Current Limit, Auto-Retry/Latchoff, Open-Circuit Detection

LT4256 Positive Hot Swap Controller Foldback Current Limit, Auto-Retry/Latchoff, Open-Circuit Detection

LTC4260 Positive Hot Swap with I2C Interface Active Current Limit, Monitors Current and Voltage

Description

Comments

Negative Hot Swap Controller in SOT-23 Active Current Limiting, Fast Comparator for Catastrophic Faults

Negative Hot Swap Controller in MSOP

Active Current Limiting, Fast Comparator for Catastrophic Faults,
Separate UV/OV Pins, Power Good Output

Negative Hot Swap Controller with Sequencer

Active Current Limiting, Fast Comparator for Catastrophic Faults,
Separate UV/OV Pins, Power Good Output, Sequencer

www.linear.com/hvhotswap n 1-800-4-LINEAR

0112A