Diodes AP2552/ AP2553/ AP2552A/ AP2553A User Manual
Description, Applications, Pin assignments
AP2552/AP2553/AP2552A/AP2553A
Document number: DS35404 Rev. 8 - 2
1 of 16
February 2014
© Diodes Incorporated
AP2552/ AP2553/ AP2552A/ AP2553A
PRECISION ADJUSTABLE CURRENT-LIMITED POWER SWITCHES
Description
The AP2552/53 and AP2552A/53A are single channel precision
adjustable current-limited switches optimized for applications that
require precision current limiting, or to provide up to 2.1A of
continuous load current during heavy loads/short circuits. These
devices offer a programmable current-limit threshold between 75mA
and 2.36A (typ) via an external resistor. Current limit accuracy ±6%
can be achieved at high current-limit settings. The rise and fall times
are controlled to minimize current surges during turn on/off.
The devices have fast short-circuit response time for improved overall
system robustness. They provide a complete protection solution for
applications subject to heavy capacitive loads and the prospect of
short circuit, offering reverse current blocking and limiting, over-
current, over-temperature and short-circuit protection, as well as
controlled rise time and under-voltage lockout functionality. A
7ms deglitch capability on the open-drain Flag output prevents false
over-current reporting and does not require any external components.
AP2552/53 limits the output current to a safe level when the output
current exceeds current-limit threshold.
AP2552A/53A provides latch-off function during over-current or
reverse-voltage conditions.
All devices are available in SOT26 and U-DFN2020-6 packages.
Applications
Set-Top-Boxes
LCD TVs & Monitors
Residential
Gateways
Laptops, Desktops, Servers, e-Readers, Printers, Docking
Stations, HUBs
Pin Assignments
Features
Up to 2.1A Maximum Load Current
Accurate Adjustable Current Limit, 75mA - 2360mA
±6% Accurate Adjustable Current Limit, 1.63A with R
LIM
= 15kΩ
Constant-Current (AP2552/53) During Over-Current
Output Latch-Off (AP2552A/53A) at Over-Current
Fast Short-Circuit Response Time: 2µs (typ)
Reverse Current Blocking During Shutdown and Reverse Current
Limiting During Enable
Operating Range: 2.7V - 5.5V
Built-in Soft-Start with 3ms Typical Rise Time
Over-Current , Output Over-Voltage and Thermal Protection
Fault Report (FAULT) with Blanking Time
ESD Protection: 2kV HBM, 500V CDM
Active Low (AP2552/52A) or Active High (AP2553/53A) Enable
Ambient Temperature Range: -40ºC to +85°C
SOT26 and U-DFN2020-6 Package: Available in “Green”Molding
Compound (No Br, Sb)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
15kV ESD Protection per IEC 61000-4-2 (with external
capacitance)
UL Recognized, File Number E322375, Vol. 1
1IEC60950-1 CB Scheme Certified
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. S more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
PAD
1
2
3
6
5
4
IN
GND
EN
OUT
FAULT
ILIM
U-DFN2020-6
(Top View)
Top View
SOT26
OUT
IN
GND
EN
ILIM
FAULT
1
2
3
6
5
4