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MOS INTEGRATED CIRCUIT
PD16855A/B/C/D
DUAL HIGH-SIDE SWITCH FOR USB APPLICATION
1998
Document No. S13020EJ1V0DS00 (1st edition)
Date Published February 1999 N CP(K)
Printed in Japan
DATA SHEET
DESCRIPTION
This product is the power switch IC with over current limit, used for the power supply bus of the Universal-Serial-
Bus (USB).
2 circuit builds in the Pch power MOSFET in the switch part, and this product realizes low on resistance (100 m
TYP.) respectively.
And the over current detection, the thermal-shutdown circuit, an under voltage locked-out (UVLO) circuit whose
functions are necessary in the Host/HUB-controller of the USB standard are built in.
And the over-current-detect result can be reported to the controller by flag-pin.
This product builds in each two circuits of the power switch, control-pins and flag-pins, and this IC can be able to
control the power supply bus in 2 USB port.
There are four kinds of this product by the input logic of the control signal and switch operation in over-current
detect.
FEATURES
Pch power MOSFET, 2 circuit building in
Over-current detection circuit is built in and its result is outputted from flag-pin ("L" active)
Prevent from dropping power supply by over current limit circuit
Thermal shutdown circuit building in
Under Voltage Locked Out (UVLO) circuit building in
Switch on/off control is possible by the control-pin.
8 pin DIP/SOP package
ORDERING INFORMATION
PART NO. PACKAGE
PD16855BC 8-pin plastic DIP (300mil)
PD16855AG 8-pin plastic SOP (225mil)
PD16855BG 8-pin plastic SOP (225mil)
PD16855CG 8-pin plastic SOP (225mil)
PD16855DG 8-pin plastic SOP (225mil)
Data Sheet S13020EJ1V0DS00
3
PD16855
CONNECTION DIAGRAM (TOP VIEW)
PIN CONFIGURATION
PIN No.
SYMBOL
I/O
FUNCTION
1/4
CTL1/CTL2
Input
Control : TTL Input
2/3
FLG1/FLG2
Output
Over Current Detect Flag : Active-L, Nch open-drain
6
GND
Power
Ground
7
IN
Power (Input)
Power Supply : Source of MOSFET
8/5
OUT1/OUT2
Output
Output of Switch : Drain of MOSFET
DESCRIPTION of
PD16855A/B/C/D FUNCTION
Abstract of Function
PART No.
CTL Input Logic
Switch Operation with Over-Current Detect
PD16855AG
"H" active
Over-Current Limit Operation. Switch Off with CTL Input "L"
PD16855BC/BG
"L" active
Over-Current Limit Operation. Switch Off with CTL Input "H"
PD16855CG
"H" active
PD16855DG
"L" active
Switch Off regardless of CTL Input
1
CTL1
OUT1
8
8-Pin DIP/SOP
2
FLG1
IN
7
3
FLG2
GND
6
4
CTL2
OUT2
5
Data Sheet S13020EJ1V0DS00
4
PD16855
PIN CONFIGURATION
(H:Hi-level, L:Low-level, ON:output ON state, OFF:output OFF state, X:H or L)
PD16855AG (Active-H)
CTL1
FLG1
OUT1
CTL2
FLG2
OUT2
Operating mode
H
H
ON
H
H
ON
normal mode
H
H
ON
L
H
OFF
only OUT1 is ON
L
H
OFF
H
H
ON
only OUT2 is ON
L
H
OFF
L
H
OFF
standby mode
H
L
ON
H
H
ON
only OUT1 is over-current detect
H
H
ON
H
L
ON
only OUT2 is over-current detect
X
L
OFF
X
L
OFF
TSD mode
X
L
OFF
X
L
OFF
UVLO mode
PD16855BC/BG (Active-L)
CTL1
FLG1
OUT1
CTL2
FLG2
OUT2
Operating mode
L
H
ON
L
H
ON
normal mode
L
H
ON
H
H
OFF
only OUT1 is ON
H
H
OFF
L
H
ON
only OUT2 is ON
H
H
OFF
H
H
OFF
standby mode
L
L
ON
L
H
ON
only OUT1 is over-current detect
L
H
ON
L
L
ON
only OUT2 is over-current detect
X
L
OFF
X
L
OFF
TSD mode
X
L
OFF
X
L
OFF
UVLO mode
Data Sheet S13020EJ1V0DS00
5
PD16855
PD16855CG (Active-H and Switch off with over-current detect)
CTL1
FLG1
OUT1
CTL2
FLG2
OUT2
Operating mode
H
H
ON
H
H
ON
normal mode
H
H
ON
L
H
OFF
only OUT1 is ON
L
H
OFF
H
H
ON
only OUT2 is ON
L
H
OFF
L
H
OFF
standby mode
H
L
OFF
H
H
ON
only OUT1 is over-current detect
H
H
ON
H
L
OFF
only OUT2 is over-current detect
X
L
OFF
X
L
OFF
TSD mode
X
L
OFF
X
L
OFF
UVLO mode
PD16855DG (Active-L and Switch off with over-current detect)
CTL1
FLG1
OUT1
CTL2
FLG2
OUT2
Operating mode
L
H
ON
L
H
ON
normal mode
L
H
ON
H
H
OFF
only OUT1 is ON
H
H
OFF
L
H
ON
only OUT2 is ON
H
H
OFF
H
H
OFF
standby mode
L
L
OFF
L
H
ON
only OUT1 is over-current detect
L
H
ON
L
L
OFF
only OUT2 is over-current detect
X
L
OFF
X
L
OFF
TSD mode
X
L
OFF
X
L
OFF
UVLO mode