SUMMIT SMH4803AHMP, SMH4803AHN, SMH4803AHNP, SMH4803AJK, SMH4803AJKP Datasheet

Distributed Power Hot-Swap Controller

FEATURES

• Supply Range ±20VDC to >±500VDC

• Versatile Card Insertion Detection Supports
Both

– Multi-length Pin Systems
– Card Injector Switch Sensing

• Control Up to Four Loads or a Primary Load and
3 DC/DC Converters

• Highly
–

•

Programmable

Sequencing DC/DC Converters

FUNCTIONAL BLOCK DIAGRAM

Programmable

Programmable

Detection

Power Good Delays for

Host Voltage Monitoring

Under- and Over-voltage

•

Programmable

–

Programmable
Programmable

–

Circuit Breaker Function

Over-current Filter
Quick-Trip™ Circuit Breaker

Values

–

Programmable

Circuit Breaker Mode

• Duty-Cycle Mode

• Latched Mode

• 2.5V and 5.0V reference outputs
– Easy Expansion of External

Monitor Functions

eaturing

F

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T

r

P

r

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g

r

a

m

C

Q

e

l

b

a

e

m

r

B

t

i

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r

i

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TM

e

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a

SMH4803

ASSOCIATE

MEMBER

VDD

EN/TS

PD1#
PD2#

Drain
Sense

CBMode

CBReset#

CBSense

UV

OV

VSS

50kΩ

Programmable

Programmable

Quick-Trip

Ref Voltage

50kΩ

12V

Delay

ENPGB

12V ref

-

+

50kΩ

Filter

-

+

+

-

2.5V

5V

+

-

50
mV

+

-

Fault
Latch
&
Duty
Cycle
Timer

-

+

Programmable

Delay

Programmable

Delay

current limit

12V

Vgate
Sense

PG3#

ENPGA

PG2#

PG1#

2.5V ref

5.0V ref

Vgate

CBFault#

2041 BD 8.0

© SUMMIT MICROELECTRONICS, Inc. 2000 • 300 Orchard City Drive, Suite 131 • Campbell, CA 95008 • Telephone [phone] • Fax [phone] • www.summitmicro.com

2041 8.4 6/15/00

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Characteristics subject to change without notice

SMH4803

Symbol Pin Description

Drain Sense 1 Drain sense input

Vgate 2 Output to MOSFET gate

EN/TS 3 Enable/Temp Sense input

PD1# 4 Pin Detect 1 (active LO)

PD2# 5 Pin Detect 2 (active LO)
CBFault# 6 Circuit Breaker Fault output
CBReset# 7 Circuit Breaker Reset intput

CBMode 8 Circuit Breaker Mode control

CBSense 9 Cicruit Breaker Sense input

Vss 10 Negative Supply Connection
UV 11 Under Voltage input
OV 12 Over Voltage input
5V 13 5V reference output

2.5V 14 2.5V reference output
ENPGB 15 Enable input B
ENPGA 16 Enable input A

PG3# 17 Power good output 3
PG1# 18 Power good output 1
PG2# 19 Power good output 2

Vdd 20 Positive supply connection

2041 PGM T2.1

PIN CONFIGURATIONS

Drain Sense

Vgate

EN/TS

PD1#

PD2#

CBFault#

CBReset#

CBMode

CBSense

Vss

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

Vdd

PG2#

PG1#

PG3#

ENPGA

ENPGB

2.5V

5V

OV

UV

2041 ILL10.1

RECOMMENDED OPERATING CONDITIONS

Condition Min Max

Temperature -40°C +85°C

DESCRIPTION

The SMH4803 is designed to control hot swapping of
plug-in cards operating from a single supply ranging from
20V to 500V. The SMH4803 hot-swap controller provides
under-voltage and over-voltage monitoring of the host
power supply, it drives an external power MOSFET switch
that connects the supply to the load, and also protects
against over-current conditions that might disrupt the host
supply. When the input and output voltages to the
SMH4803 controller are within specification, the
SMH4803 provides three “Power Good” logic outputs that

2041 PGM T3.0

may be used to turn ON the loads, e.g. isolated-output DC­DC converters, or drive LED status lights. The SMH4803
provides three separate “Power Good” logic outputs that
activate loads in a timed sequence. Additional features of
the SMH4803 include: temperature sense or master en­able input, 2.5V and 5V reference outputs for expanding
monitor functions, two “Pin-Detect” enable inputs for fault
protection, and duty-cycle or latched over-current protec­tion modes.

2041 8.4 6/15/00

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SUMMIT MICROELECTRONICS

SMH4803

ABSOLUTE MAXIMUM RATINGS

Temperature Under Bias -55°C to +125°C
Storage Temperature -65°C to +150°C
Voltage on pins with respect to V

UV, OV, CBSense, Drain Sense -0.5V to Vdd +0.5V

PD1#, PD2#, CBMode, CBReset# 10V

ENPGA, ENPGB, EN/TS

CBFault#, PG1#, PG2#, PG3# -0.5V to Vdd +0.5V

Lead Solder Temperature (10 secs) 300 °C

SS

Vdd -0.5V to Vdd

Vgate Vdd + 0.5V

DC OPERATING CHARACTERISTICS (Over Recommended Operating Conditions, Voltages are relative to V

*COMMENT

Stresses 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 outside
those listed in the operational sections of this speci­fication is not implied. Exposure to any absolute
maximum rating for extended periods may affect
device performance and reliability.

SS

Symbol Parameter Notes Min. Typ. Max. Units

V

DD

Supply Voltage IDD = 2mA 11 12 13 V
Vref5 5Volt Reference Output IDD = 2mA 4.7 5 5 5.25 V
I

LOAD5

5Volt Reference Output Current IDD = 2mA -1 1 mA
Vref2.5 2.5 Volt Reference Output TA = 25 °C, IDD = 2mA 2.475 2.5 2.525 V
Vref2.5 2.5 Volt Reference Output IDD = 2mA 2.425 2.5 2.575 V
I

LOAD2.5

I

DD

V

UV

V

UV

V

UVHYS

V

OV

V

OV

V

OVHYS

V

VGATE

I

VGATE

V

SENSE

V

SENSE

I

SENSE

V

CB

V

QCB

V

ENTS

V

ENTS

V

ENTSHYS

V

IH

2.5 Volt Reference Output Current IDD = 2mA -0.2 1 mA

Power Supply Current Output Enabled 2 10 mA

Under voltage Threshold TA = 25 °C, IDD = 2mA 2.475 2.5 2.525 V

Under voltage Threshold IDD = 2mA 2.425 2.5 2.575 V

Under voltage Hysteresis IDD = 2mA 10 mV

Over voltage Threshold TA = 25 °C, IDD = 2mA 2.475 2.5 2.525 V

Over voltage Threshold IDD = 2mA 2.425 2.5 2.575 V

Over voltage Hysteresis IDD = 2mA 10 mV

Vgate Output Voltage V

DD

Vgate Current Output 100 µ A

Drain Sense threshold TA = 25 °C, IDD = 2mA 2.475 2.5 2.525 V

Drain Sense threshold IDD = 2mA 2.425 2.5 2.575 V

Drain Sense Output Current (Note 1) V

SENSE

= V

SS

91011µA
Circuit Breaker Threshold IDD = 2mA 40 50 60 mV
Quick-Trip Circuit Breaker Threshold

Option E

Option F

Option H

Option J

200 mV
100 mV

50 mV

OFF
EN/TS Threshold TA = 25 °C, IDD = 2mA 2.425 2.5 2.575 V
EN/TS Threshold IDD = 2mA 2.475 2.5 2.525 V
EN/TS Hysteresis IDD = 2mA 5 10 15 mV
Input High Voltage ENPGA/B, 2 Vref5 V
CBMode, CBReset#

V

IL

Input High Voltage ENPGA/B, -0.1 0.8 V
CBMode, CBReset#

V

OL

V

OL

CBFault# Output Low Voltage IOL = 2mA 0 0.4 V
PG1#, PG2#, PG3# Output Low I

= 2mA 0 0.4 V

SINK

)

V

(Note 1) : TA = 25 °C

SUMMIT MICROELECTRONICS

2041 PGM T4.4

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2041 8.4 6/15/00

SMH4803

AC Timing Characteristics, -40oC to +85oC

Symbol Description Min. Typ. Max Unit

t

PDD

t

CBD

P

GD

t

FSTSHTDN

t

CYC

t

VGD

t

CBRST

Pin Detect Delay to Vgate enable 80 ms
50mv Circuit Breaker Delay (Filter)

K 400 µs

L 150 µs
M50µs
N5µs

Power Good Delay (PG1/PG2, PG2/PG3)

A5ms

B20ms
C80ms
D 180 ms

Fast Shut Down Delay From Fault to 200 ns
Vgate Off

Circuit Breaker Cycle Mode Cycle Time 2.5 Sec.
Delay from Release of Reset to Vgate on 100 ns
CBReset# Pulse Width 200 ns

2041 8.4 6/15/00

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SUMMIT MICROELECTRONICS

VDD

UV

OV

PD1#/PD2#

Vgate

Drain
Sense

SMH4803

≥11V≤13V

2.5V ref

2.5V ref

tPDD

2.5V ref

CBSense

PG1#

ENPGA

PG2#

ENPGB

PG3#

50mV ref

<tCBD

PGD

PGD

2041 ILL18.0

SUMMIT MICROELECTRONICS

Figure 1. Power Sequencing Timing Characteristics

5

2041 8.4 6/15/00

SMH4803

V

IH

CBMode

50mV

CBSense

Vgate

CBReset#

t

CBD

t

CYC

V

IH

Figure 2. Circuit Breaker Timing - Cycle Mode, CBReset# Held High

V

IH

t

CBD

2041 ILL16.0

CBMode

CBSense

Vgate

CBReset#

50mV

V

IL

t

CBD

t

CYC

Figure 3. Circuit Breaker Timing - Cycle Mode, Used to Enable Vgate

2041 ILL17.0

2041 8.4 6/15/00

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SUMMIT MICROELECTRONICS

SMH4803

CBMode

CBSense

Vgate

CBReset#

VIL

tCBD

50mV

tVGD

tCBRST

2041 ILL14.0

Figure 4. Circuit Breaker Timing - Reset Mode

QCB

50mV

CBSense

Vgate

<t

V

Figure 5. Circuit Breaker Timing - Quick-Trip

CBD

t

FSTSHTDN

2041 ILL15.0

SUMMIT MICROELECTRONICS

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2041 8.4 6/15/00