PI5PD2556 Datasheet, PDF (1/12 Pages) Pericom Semiconductor Corporation – Precision Adjustable Current -Limited Power Switch

PI5PD2556/2557
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Precision Adjustable Current -Limited Power Switch
Features
Description
 Meets USB Current-Limiting Requirement
 ±6.5% Current-Limit Accuracy at 4.0A
 Adjustable Current Limit, 500mA-5A (typ.)
 Fast Over-current Response - 3.5μS (typ.)
 22mΩ High-Side MOSFET
 Operating Range: 2.5 V to 5.5V
 2-μA Maximum Standby Supply Current
 Built-in Soft-Start
 15 kV / 8 kV System-Level ESD Capable
 Device Package: TDFN 3x3-8L
 UL Listed – File No. E341484
 CB Certified
Applications
 USB Ports/Hubs
 Digital TV
 Set-Top Boxes
 VOIP Phones
Pin Configuration
GND 1
IN 2
8 FAULT
7 OUT
The PI5PD2556/2557 series is single-channel power-
distribution switch intended for applications where
precision current limiting is required or heavy capacitive
loads and short circuits are encountered. These devices
offer a programmable current-limit threshold between
500 mA and 5A (typ) per channel via an external resistor.
The power-switch rise and fall times are controlled to
minimize current surges during turn on/off.
Each channel of the PI5PD2556/2557 devices limits the
output current to a safe level by switching into a
constant-current mode when the output load exceeds the
current-limit threshold.
Typical Application Circuit
VVIoNut
IN
O UT
R1
10 0k
/FAULT1 Sign al
C in
IN
0. 1uF
/FAU LT
O UT
IL IM
Con trol In put
R adj
EN
G ND
P ow er Pa d
Vout
C out
IN 3
/EN(EN) 4
6 ^OUT
5 ILIM
Figure 1 Typical Application Circuit
TDTFDNF3Nx32-x83L-8(LTo(Tp _{oVpieVwie) w)}
Pin Description
Pin Name
Pin No.
PI5PD2556 PI5PD2557
1
GND
2, 3
IN
4
/EN
EN
5
ILIM
6, 7
OUT
8
/FAULT
Type
-
I
I
I
O
O
Description
Ground.
Power input voltage.
Enable input, logic low turns on power switch for PI5PD2556, logic high
turns on power switch for PI5PD2557.
External resistor used to set current-limit threshold; recommended 20 kΩ ≤
RILIM ≤ 187 kΩ.
Power switch output for channel two
Active-low open-drain output, asserted during over-current or over-
temperature condition or reverse voltage occurs
2015-08-0011
PT0497-4 08/31/15
1