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Part Number SC1011

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SC1011 data sheet
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POWER MANAGEMENT
1
www.semtech.com
SC1011
PCI Hot Plug
Controller
.eatures
Applications
Revision 1, April 2001
Typical Application Circuit
Description
The SC1011 is a PCI Hot-Plug voltage bus control IC. It is
used in computer systems to facilitate hot plugging of
adapter cards into and out of an active or passive back
plane. Along with discrete power MOS.ETs and a few
passive components, the small-size SC1011 creates a
complete power control solution. .our independent sup-
plies are controlled, +5V, +3.3V, +12V and -12V. The
+12V and -12V switches are integrated. .or the +5V
and +3.3V supplies, overcurrent protection is provided
by sensing the voltage across external current-sense
resistors. .or the +12V and -12V supplies, overcurrent
protection is provided internally. In addition, an on-chip
reference is used to monitor the +5V, +3.3V and +12V
outputs for undervoltage conditions. The PWRON input
controls the state of the switches. During an overcurrent
condition on any output, or an undervoltage condition on
the +5V, +3.3V or +12V outputs, all MOS.ETs are
immediately latched off and a LOW (0V) is asserted on
the .LTN output. The .LTN latch is cleared when the
PWRON input is toggled low again. During initial power-up
of the main VCC supply (+12V), the PWRON input is
inhibited from turning on the switches, and the latch is
held in the Reset state until the VCC input is greater than
10V.
User programmability of the overcurrent threshold and
turn-on slew rate is provided. A resistor connected to
the OCSET pin programs the overcurrent threshold.
Capacitors connected to the gate pins set the turn-on
rate. Also, a capacitor may be added to the .LTN pin to
provide noise immunity.
K
Controls distribution of four supplies: +5V, +3.3V,
+12V and -12V
K
Internal MOS.ET switches for +12V and -12V
outputs
K
Microprocessor interface for On/Off control and
fault reporting
K
Adjustable overcurrent protection
K
Provides fault isolation
K
Adjustable turn-on slew rate
K
Minimum parts count solution
K
Industrial temperature range
K
SO 16 pin package
K
PCI Hot-Plug
K
CompactPCI
TM
5 V I N
G N D
1 2 V O U T
- 1 2 V O U T
3 . 3 V I N
5 V O U T
3 . 3 V O U T
- 1 2 V I N
1 2 V I N
P W R O N
V C C
F L T N
U 1
S C 1 0 1 1
1
2
3
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1 0
1 1
1 2
1 3
1 4
1 5
1 6
M 1 2 V I N
F L T N
3 V 5 V G
V C C
1 2 V I N
3 V I S E N
3 V S
O C S E T
P W R O N
5 V S
5 V I S E N
1 2 V O
G N D
1 2 V G
M 1 2 V G
M 1 2 V O
Q 1
I R F 0 4 4
Q 2
I R F 0 4 4
R 3
6 . 0 4 k
C 1
2 2 n F
C 2
2 2 n F
C 3
2 2 n F
R 1
1 0 m O h m
R 2
1 0 m O h m
C 5
1 0 0 n F
C 4
0.1nF (optional)
.igure 1
background image
2
2001 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC1011
Electrical Characteristics
Absolute Maximum Ratings
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background image
3
2001 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC1011
Electrical Characteristics - (Cont.)
Unless specified: VCC = 12VIN = 12V; M12VIN = -12V; T
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= T
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= 0 to 70
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background image
4
2001 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC1011
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Electrical Characteristics - (Cont.)
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5
2001 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC1011
Pin Configuration
Ordering Information
Pin Descriptions
Top View
(16-Pin SOIC)
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