AP2552 Datasheet, PDF (1/16 Pages) Diodes Incorporated – The AP2552/53and AP2552A/53A are single channel precision adjustable current-limited switches optimized for the applications...

AP2552/ AP2553/ AP2552A/ AP2553A
PRECISION ADJUSTABLE CURRENT-LIMITED POWER SWITCHES
Description
The AP2552/53and AP2552A/53A are single channel precision
adjustable current-limited switches optimized for the applications
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 2.35A (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 timefor 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-DFN2020C-6 packages.
Applications
• Set-Top-Boxes
• LCD TVs & Monitors
• Residential Gateways
• Laptops, Desktops, Servers, e-Readers, Printers, Docking
Stations, HUBs
Pin Assignments
(Top View)
OUT
ILIM
FAULT
1
6
2 PAD 5
3
4
IN
GND
EN
U-DFN2020C-6
(Top View)
IN
1
GND
2
EN
3
6
OUT
5
ILIM
4
FAULT
SOT26
Features
• Up to 2.1A maximum load current
• Accurate adjustable current limit, 75mA - 2350mA
• ±6% accurate adjustable current limit, 1.61A 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 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 (to be completed)
• IEC60950-1 CB Scheme Certified (to be completed)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com for 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.
AP2552/AP2553/AP2552A/AP2553A
Document number: DS35404 Rev. 5 - 2
1 of 16
www.diodes.com
December 2012
© Diodes Incorporated