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PDF AP2821 Data sheet ( Hoja de datos )
| Número de pieza | AP2821 | |
| Descripción | High-side Power Distribution Switch | |
| Fabricantes | BCD | |
| Logotipo |  |
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
General Description
The AP2821 is an integrated high-side power switch
that consists of TTL compatible enables input, a
charge pump, and N-Channel MOSFET. The switch’s
low RDS (ON), 120mΩ, meets USB voltage drop
requirements. It includes soft-start to limit inrush
current, over-current protection with fold-back, and
thermal shutdown to avoid switch failure during hot
plug-in. Under voltage lockout (UVLO) function is
used to ensure the device remain off unless there is a
valid input voltage present. And no reverse current
when power off, with shutdown pull-low resistor to
discharge the output capacitor when EN is disable.
The AP2821 is available in standard package of
SOT-23-5.
Features
• Low MOSFET on Resistance: 120mΩ
@VIN=5.0V
• Compliant to USB Specifications
• Operating Voltage Range: 2.7V to 5.5V
• Low Supply Current: 35μA (Typ.)
• Low Shutdown Current: <1μA
• Current Limit with Fold-back: 2A
• Under-voltage Lockout
• Soft Start-up
• Over-current Protection
• Over Temperature Protection
• Load Short Protection with Fold-back
• No Reverse Current when Power off
• Pass System ESD: IEC61000-4-2
± 16KV (Air Discharge) and ± 8KV (Contact
Discharge) on USB Connector
Applications
• USB Power Management
• USB Bus/Self Powered Hubs
• Hot-plug Power Supplies
• Battery-charger Circuits
• Notebooks, Motherboard PCs
Mar. 2013 Rev 2. 0
SOT-23-5
Figure 1. Package Type of AP2821
BCD Semiconductor Manufacturing Limited
1
1 page  
Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Absolute Maximum Ratings (Note 1)
Parameter
Power Supply Voltage
Operating Junction Temperature
Range
Storage Temperature Range
Lead Temperature (Soldering,10
Seconds)
Thermal Resistance
(Junction to Ambient)
ESD (Machine Model)
ESD (Human Body Model)
Symbol
VIN
TJ
TSTG
TLEAD
θJA
Value
6.0
150
-65 to 150
260
235
200
2000
Unit
V
ºC
ºC
ºC
ºC/W
V
V
Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute
Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Supply Voltage
Ambient Operation
Range
Temperature
Symbol
VIN
TA
Min
2.7
-40
Max
5.5
85
Unit
V
°C
Mar. 2013 Rev 2. 0
BCD Semiconductor Manufacturing Limited
5
5 Page 
Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Typical Performance Characteristics (Continued)
VEN
5V/div
VOUT
1V/div
IOUT
500mA
/div
Time 1ms/div
VEN
5V/div
VOUT
1V/div
Time 1ms/div
Figure 20. Switch Turn-on and Rise Time
(VIN=5.0V, COUT=100μF, RL=10Ω)
Figure 21. Switch Turn-off and Fall Time
(VIN=3.3V, COUT=4.7μF, No Load)
VEN
5V/div
VOUT
1V/div
VEN
5V/div
VOUT
1V/div
Time 1ms/div
Figure 22. Switch Turn-off and Fall Time
(VIN=5.0V, COUT=4.7μF, No Load)
Time 10ms/div
Figure 23. Switch Turn-off and Fall Time
(VIN=3.3V, COUT=100μF, No Load)
Mar. 2013 Rev 2. 0
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet AP2821.PDF ] | |
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