Diodes AP2337 User Manual
AP2337
1.0A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Description
The AP2337 is single channel current-limited integrated hi ghside power switches optimized for hot-swap applications. The
devices have fast short-circuit response time for improved
overall system robustness and provide a complete protection
solution for application subject to heavy capacitive loads and
the prospect of short circuit. It offers reverse current blocking,
over-current, over-temperature and short-circuit protection,
as well as controlled rise time and under-voltage lockout
functionality.
The device is available in SOT23 package.
Features
• Input voltage range: 2.7V – 5.5V
• Fast short-circuit response time
• 1.5A accurate current limiting
NEW PRODUCT
• 110mΩ on-resistance
• Reverse Current Blocking
• Built-in soft-start with 2.5ms typical turn-on time
• Over Current Protection
• Over Voltage Protection
• Short circuit and thermal protection
• ESD protection: 3KV HBM, 300V MM
• Ambient temperature range: -40ºC to 85°C
• Available in “Green” Molding Compound (No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)
• UL Recognized, File Number E322375 (to be completed)
• IEC60950-1 CB Scheme Certified (to be completed)
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
Pin Assignments
Applications
• LCD TVs & Monitors
• Set-Top-Boxes, Residential Gateways
• Laptops, Desktops, Servers
• Printers, Docking Stations, HUBs
• Smart phones, e-Readers
GND
OUT
( Top View )
1
2
SOT23
IN
3
Typical Application Circuit
Power Supply
2.7V to 5.5V
AP2337
Document number: DS35060 Rev. 2 - 2
0.1µF
IN
OUT
GND
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0.1µF
Load
October 2011
© Diodes Incorporated
1.0A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Pin Descriptions
Pin Name Pin Number Descriptions
GND
OUT
1 Ground
2 Switch output pin
IN 3 Voltage input pin
Function Block Diagram
Reverse
Voltage
Comparator
-
+
AP2337
NEW PRODUCT
IN
UVLO
Driver
Thermal
Sense
Reverse
Current
Limit
Current
Sense
Current
Limit
Absolute Maximum Ratings
Symbol Parameter Ratings Units
ESD HBM Human Body Model ESD Protection 3 KV
ESD MM Machine Model ESD Protection 300 V
VIN
V
OUT
I
load
T
Jmax
TST
Notes: 2. UL Recognized Rating from -30°C to 70°C (Diodes qualified TST from -65°C to 150°C)
Input Voltage 6.5 V
Output Voltage
Maximum Continuous Load Current Internal Limited A
Maximum Junction Temperature 150 °C
Storage Temperature Range (Note 2) -65 to 150 °C
0.6ms
Deglitch
Time
15us
Deglitch
Time
Discharge
Control
VIN + 0.3
OUT
GND
V
AP2337
Document number: DS35060 Rev. 2 - 2
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October 2011
© Diodes Incorporated
AP2337
A
Recommended Operating Conditions
Symbol
V
IN
I
OUT
T
Electrical Characteristics (T
Symbol Parameter Test Conditions (Note 3) Min Typ. Max Unit
V
Input UVLO
UVLO
I
Input quiescent current
Q
I
Reverse leakage current
REV
R
DS(ON)
I
LIMIT
NEW PRODUCT
T
SHORT
I
ROCP
T
V
T
TON
T
T
SHDN
T
Notes: 3. Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately.
4. During output over-voltage protection, the output draws approximately 60µA current.
5. Since the output turn-on slew rate is dependent on input supply slew rate, this limit is only applicable for input supply slew rate between 5V/0.2ms to
5V/1ms.
6. Device mounted on FR-4 substrate PCB, 2oz copper, with minimum recommended pad layout.
7. Applicable for output voltage slew rate ≤ 5V/30μs.
Switch on-resistance
Over-load current limit
IOS
Short-circuit current
Short-circuit response time
Reverse current limit Above UVLO 0.3 0.5 0.7 A
Deglitch time from reverse current
Trig
trigger to MOSFET turn off
Output over-voltage trip point Above UVLO (Note 4) 110% 120%
OVP
Debounce time from output over-
OVP
voltage to MOSFET turn off
Output turn-on time (Note 5)
Discharge time
DIS
Thermal shutdown threshold 150 °C
Thermal shutdown hysteresis 20 °C
HYS
Thermal Resistance Junction-to-
θ
JA
Ambient
Input voltage 2.7 5.5 V
Output Current 0 1.0 A
Operating Ambient Temperature -40 85
1.0A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Parameter Min Max Units
= 25oC, V
A
= +5.0V, unless otherwise stated)
IN
VIN rising
Above UVLO, I
VIN = 0V, V
= 5V, I
V
IN
OUT
VIN = 3.3V, I
VIN = 5V, V
= 0
OUT
= 5V, I
OUT
= 1A
= 1A
OUT
= 4V, CL=10μF
OUT
REV
at VIN
OUT connected to ground, CL=10μF
From V
< 0.6V to I
OUT
= 0A (OUT shorted to
OUT
GND) (See Figure. 1)(Note 7)
2.00 2.65 V
65 110 μA
0.01 0.1 μA
110 140 mΩ
140 170
1.1 1.5 1.9 A
0.2 0.6 1.0 A
5 μs
0.6 ms
15 μs
CL = 1μF, R
CL= 1μF, from UVLO to V
= 5Ω (UVLO to 90% V
load
OUT
< 0.3V
OUT-NOM
)
1 4 ms
500 μs
(Note 6) 180
°C
VIN
o
C/W
Figure 1. Short Circuit Response Time
AP2337
Document number: DS35060 Rev. 2 - 2
3 of 10
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October 2011
© Diodes Incorporated
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