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TPS5511 Datasheet Preview

TPS5511 Datasheet

3-CHANNEL POWER SUPPLY SUPERVISOR

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TPS5511
3-CHANNEL POWER SUPPLY SUPERVISOR
D Over Voltage Protection and Lock Out for
5 V, 3.3 V, and 12 V
D Fault Protection Output with Open Drain
Output Stage
D Open Drain Power Good Output Signal for
Power Good Input, 5 V and 3.3 V
D 300 ms Power Good Delay
D 2.3 ms PSON Control to FPO Turn-Off Delay
D 38 ms PSON Control Debounce
D 73 µs Width Noise Deglitches
D Wide Power Supply Voltage Range
from 4 V to 15 V
SLVS170 – AUGUST 1998
D OR P PACKAGE
(TOP VIEW)
PGI
GND
FPO
PSON
1
2
3
4
8 PGO
7 VCC
6 VS5
5 VS33
description
The TPS5511 is designed to minimize the external components of personal-computer switching power supply
systems. It provides protection circuits, power good indicator, fault protection output (FPO), and PSON control.
OVP (over voltage protection) monitors 5 V, 3.3 V, and 12 V (12 V OV detects via VCC terminal). When an OV
condition is detected, the PGO (power good output) is asserted low and FPO is latched high. PSON from low
to high resets the protection latch. There is a 2.3-ms turn-off delay from PSON to FPO. There is no delay during
turn on.
Power good feature monitors PGI, 5 V and 3.3 V under voltages and issues a power good signal when they are
ready.
The TPS5511 is characterized for operation from TJ = –40°C to 125°C junction temperature.
5 VSB
PGI
PSON
TPS5511
1
PGI
8
PGO
2
GND
3
FPO
7
VCC
6
VS5
4
PSON
5
VS33
0.5 V
Drop
PGO
12 V
VSB
5V
3.3 V
Figure 1. TPS5511 Typical Application
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1998, Texas Instruments Incorporated
1




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TPS5511 Datasheet Preview

TPS5511 Datasheet

3-CHANNEL POWER SUPPLY SUPERVISOR

No Preview Available !

TPS5511
3-CHANNEL POWER SUPPLY SUPERVISOR
SLVS170 – AUGUST 1998
functional block diagram
VCC
Vref –
12 OV
+
RI = 200 k
RST
VS5
VS33
5 OV
Vref –
+
RI = 100 k
3.3 OV
Vref –
+
RI = 100 k
Vref
+
3.3 UV
Vref –
+
5 UV
Vref –
PGI +
RST
POR
Reset
R
73 µs
Debounce
Vreg
Bandgap
Reference
VCCI = 3.6 V
R
R
Vref
1.192 V
RTT
SQ
FPO
Reset
OSC
2.3 ms
Delay
EN
Reset
Dominent
Latch
VCC
150 µA
RTT
RST
Reset VCCI
38 ms
Debounce
PSON
R
73 µs
Debounce
300 ms
EN Delay
Counter
VCC
Pull-High
Resistor
PGO
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number TPS5511
Description 3-CHANNEL POWER SUPPLY SUPERVISOR
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