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MIC2085-LBQS Datasheet

  • MIC2085-LBQS

  • Single Channel Hot Swap Controllers

  • 406.52KB

  • 28页

  • MICREL

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MIC2085/2086
Micrel
MIC2085/MIC2086
Single Channel Hot Swap Controllers
General Description
The MIC2085 and MIC2086 are single channel positive
voltage hot swap controllers designed to allow the safe
insertion of boards into live system backplanes. The MIC2085
and MIC2086 are available in 16-pin and 20-pin QSOP
packages, respectively. Using a few external components
and by controlling the gate drive of an external N-Channel
MOSFET device, the MIC2085/86 provide inrush current
limiting and output voltage slew rate control in harsh, critical
power supply environments. Additionally, a circuit breaker
function will latch the output MOSFET off if the current limit
threshold is exceeded for a programmed period of time. The
devices鈥?array of features provide a simplified yet robust
solution for many network applications in meeting the power
supply regulation requirements and affords protection of
critical downstream devices and components.
All support documentation can be found on Micrel鈥檚 web
site at www.micrel.com.
Features
鈥?MIC2085: Pin for pin functional equivalent to the
LTC1642
鈥?2.3V to 16.5V supply voltage operation
鈥?Surge voltage protection to 33V
鈥?Operating temperature range 鈥?0掳C to 85掳C
鈥?Active current regulation limits inrush current
independent of load capacitance
鈥?Programmable inrush current limiting
鈥?Analog foldback current limiting
鈥?Electronic circuit breaker
鈥?Dual-level overcurrent fault sensing
鈥?Fast response to short circuit conditions (< 1碌s)
鈥?Programmable output undervoltage detection
鈥?Undervoltage lockout protection
鈥?Power-on reset (MIC2085/86) and
power-good (MIC2086) status outputs
鈥?/FAULT status output
鈥?Driver for SCR crowbar on overvoltage
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
RAID systems
Cellular base stations
LAN servers
WAN servers
InfiniBand鈩?Systems
Industrial high side switching
Typical Application
Backplane PCB Edge
Connector Connector
V
IN
12V
Long
Pin
R1
3.3鈩?/div>
C1
1碌F
3
R
SENSE
0.007鈩?/div>
1
2%
2
4
Q1
Si7884DP
(PowerPAK
TM
SO-8)
V
OUT
12V@5A
C
LOAD
220碌F
Short
Pin
16
15
*R6
10鈩?/div>
R7
127k鈩?/div>
1%
V
LOGIC
GATE
COMP+
14
11
10
VCC
R5
47k鈩?/div>
R2
100k鈩?/div>
1%
4
SENSE
R10
47k鈩?/div>
R11
47k鈩?/div>
ON
/FAULT
COMPOUT
Output Signal
(Power Good)
/FAULT
R3
Medium 1.82k鈩?/div>
1%
(or Short)
Pin
R4
10k鈩?/div>
1%
6
C2
0.022碌F
MIC2085
/POR
FB
5
7
PWRGD
LOGIC
CONTROLLER
/RESET
9
12
13
OV
COMP鈥?/div>
REF
CPOR
3
Power-On Reset
Output
R8
16.2k鈩?/div>
1%
C7
0.033碌F
CRWBR
GND
8
1
Q2
2N4401
CFILTER
2
Q3
TCR22-4
GND
Long
Pin
C3
0.1碌F
C4
0.1碌F
C5
8200pF
C6
0.01碌F
**R9
180鈩?/div>
Overvoltage (Input) = 13.3V
Undervoltage Lockout = 10.8V
Undervoltage (Output) &
Power-Good (Output) = 11.4V
POR/START-UP DELAY = 60ms
Circuit-Breaker Response Time = 500碌s
*R6 is an optional component used for noise filtering
**R9 needed when using a sensitive gate SCR
InfiniBand is a trademark of InfiniBand Trade Association
PowerPAK is a trademark of Vishay Intertechnology Inc.
Micrel, Inc. 鈥?1849 Fortune Drive 鈥?San Jose, CA 95131 鈥?USA 鈥?tel + 1 (408) 944-0800 鈥?fax + 1 (408) 944-0970 鈥?http://www.micrel.com
January 2004
1
M0235-121903

MIC2085-LBQS 产品属性

  • 196

  • 集成电路 (IC)

  • PMIC - 热交换

  • -

  • 热交换控制器

  • 通用型 Infiniband?

  • 无

  • -

  • 2.3 V ~ 16.5 V

  • -40°C ~ 85°C

  • 表面贴装

  • 16-SSOP（0.154"，3.90mm 宽）

  • 16-QSOP

  • 管件

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