Download Advance Datasheet General Description Features

Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
General Description
Features
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.
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•
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•
•
•
•
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The AP2821 is available in standard package of
SOT-23-5.
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
SOT-23-5
Figure 1. Package Type of AP2821
Mar. 2013
Rev 2. 0
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Pin Configuration
K Package
（SOT-23-5）
Figure 2. Pin Configuration of AP2821 (Top View)
Pin Descriptions
Pin No.
Name
Descriptions
1
VOUT
Switch Output Voltage
2
GND
3
EN
Chip Enable Control Input, Active High
4, 5
VIN
Supply Input Pin
Mar. 2013
Ground
Rev 2. 0
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Functional Block Diagram
VIN
3
EN
4,5
Clock
Gate Control
Band Gap
Reference
Over Current
Limiting
CMP
Current
Sense
1
VOUT
Shutdown
Signal
UVLO
GND
Thermal
Sense
2
Figure 3. Functional Block Diagram of AP2821
Mar. 2013
Rev 2. 0
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Ordering Information
AP2821
-
Circuit Type
G1: Green
Package
K: SOT-23-5
Package
Temperature
Range
SOT-23-5
-40 to 85°C
TR: Tape & Reel
Part Number
AP2821KTR-G1
Marking ID
G4E
Packing Type
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and Green.
Mar. 2013
Rev 2. 0
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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)
Symbol
Value
Unit
VIN
6.0
V
TJ
150
ºC
TSTG
-65 to 150
ºC
TLEAD
260
ºC
θJA
235
ºC/W
200
V
2000
V
ESD (Human Body Model)
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
Mar. 2013
Temperature
Symbol
Min
Max
Unit
VIN
2.7
5.5
V
TA
-40
85
°C
Rev 2. 0
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Electrical Characteristics
(VIN=5.0V, CIN=4.7μF, COUT=4.7μF, Typical TA=25°C, unless otherwise specified)
Parameter
Symbol
Input Voltage Range
VIN
Switch On Resistance
RDS(ON)
Test Conditions
Min
Typ
2.7
VIN=5V, IOUT=0.5A
5.5
V
120
140
mΩ
2.0
2.8
A
65
μA
Current Limit
ILIMIT
VOUT=4.0V
Supply Current
ISUPPLY
VIN=5V, RLOAD Open
35
Fold-back Short Current
ISHORT
VOUT=0V
1.5
VEN=0V, Shutdown Mode
0.1
1
μA
ILEAKAGE
VEN=0V, VOUT=0V
0.1
1
μA
Enable High Voltage
VENH
Enable Logic High
2.0
6.0
V
Enable Low Voltage
VENL
Enable Logic Low
0
1.2
V
Force 0V to 5.0V at EN Pin
0
1.0
μA
2.7
V
Shutdown Supply Current
Output Leakage Current
Enable Pin Input Current
Under
Voltage
Threshold Voltage
Lockout
ISHUTDOWN
IEN
VUVLO
Under Voltage Hysteresis
VUVLOHY
Reverse Current
IREVERSE
Shutdown Pull Low Resistance
Output Turn-on Time
Thermal Shutdown
Temperature
Thermal Shutdown Hysteresis
Thermal Resistance
(Junction to Case)
Mar. 2013
RDISCHARGE
tON
1.5
Max Unit
VIN Increasing from 0V
2.2
2.5
A
0.2
V
VEN=0V, VOUT>VIN
0.1
1.0
μA
VEN is disable
100
250
Ω
From Enable Active to 90% of
Output, RL=10Ω
1.9
TOTSD
145
THYOTSD
20
θJC
70
Rev 2. 0
ms
o
C
ºC/W
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Typical Performance Characteristics
80
3.0
75
VEN=VIN
70
VIN=5V
2.8
65
2.6
55
Current Limit (A)
Supply Current (μA)
60
50
45
40
35
30
25
20
2.4
2.2
2.0
o
TA=-40 C
15
1.8
o
TA=25 C
10
o
TA=85 C
5
1.6
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
-40
-20
0
20
40
60
80
o
Temperature ( C)
Input Voltage (V)
Figure 4. Supply Current vs. Input Voltage
Figure 5. Current Limit vs. Temperature
2.6
2.4
VIN=5V
2.4
o
TA=25 C
2.2
Enable Input Threshold (V)
Enable Input Threshold (V)
2.1
1.8
VEN Rising
VEN Falling
1.5
1.2
0.9
0.6
2.0
1.8
1.6
1.4
1.2
VEN Rising
VEN Falling
1.0
0.8
0.6
0.4
0.3
0.2
0.0
0.0
-40
-20
0
20
40
60
2.5
80
o
Figure 6. Enable Input Threshold vs. Temperature
Mar. 2013
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Temperature ( C)
Figure 7. Enable Input Threshold vs. Input Voltage
Rev 2. 0
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Typical Performance Characteristics (Continued)
3.0
5
2.8
4
2.4
Output Voltage (V)
UVLO Threshold (V)
2.6
2.2
2.0
1.8
VIN Rising
VIN Falling
1.6
3
2
No Load
VIN Rising
VIN Falling
UVLO
1
1.4
1.2
0
1.0
-40
-20
0
20
40
60
80
0
o
Temperature ( C)
1
2
Figure 8. UVLO Threshold Voltage vs. Temperature
4
5
Figure 9. UVLO Function
400
300
IOUT=1A
350
280
300
Switch-on Resistance (mΩ)
260
Switch-on Resistance (mΩ)
3
Input Voltage (V)
o
TA=-40 C
o
TA=25 C
250
o
TA=85 C
200
150
100
50
IOUT=1A
240
220
200
180
160
140
120
VIN=3V
VIN=4V
VIN=5V
100
80
60
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
-40
0
20
40
60
80
Temperature ( C)
Figure 10. Switch-on Resistance vs. Input Voltage
Mar. 2013
-20
o
Input Voltage (V)
Figure 11. Switch-on Resistance vs. Temperature
Rev 2. 0
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Typical Performance Characteristics (Continued)
2.0
2.0
TA=25 C
Output Short to GND Current (A)
Output Short to GND Current (A)
O
1.8
1.6
1.4
1.2
VIN=5V
VEN=5V
1.8
1.6
1.4
1.2
1.0
0.8
0.6
1.0
3.0
3.5
4.0
4.5
5.0
-40
5.5
-20
0
20
40
60
80
O
Temperature ( C)
Input Voltage (V)
Figure 12. Output Short to GND Current
vs. Input Voltage
Figure 13. Output Short to GND Current
vs. Temperature
5
VEN
5V/div
Output Voltage (V)
4
3
2
VIN=5V
VEN=5V
1
VOUT
1V/div
O
TA=25 C
0
0.0
0.5
1.0
1.5
2.0
2.5
Time 1ms/div
Output Current (A)
Figure 14. Output Voltage vs. Output Current
Mar. 2013
Figure 15. Switch Turn-on and Rise Time
(VIN=3.3V, COUT=4.7μF, No Load)
Rev 2. 0
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Typical Performance Characteristics (Continued)
VEN
5V/div
VEN
5V/div
VOUT
1V/div
VOUT
1V/div
IOUT
500mA
/div
Time 1ms/div
Time 1ms/div
Figure 16. Switch Turn-on and Rise Time
(VIN=5.0V, COUT=4.7μF, No Load)
Figure 17. Switch Turn-on and Rise Time
(VIN=3.3V, COUT=4.7μF, RL=10Ω)
VEN
5V/div
VEN
5V/div
VOUT
1V/div
VOUT
1V/div
IOUT
500mA
/div
IOUT
500mA
/div
Time 1ms/div
Time 1ms/div
Figure 18. Switch Turn-on and Rise Time
(VIN=5.0V, COUT=4.7μF, RL=10Ω)
Mar. 2013
Figure 19. Switch Turn-on and Rise Time
(VIN=3.3V, COUT=100μF, RL=10Ω)
Rev 2. 0
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Typical Performance Characteristics (Continued)
VEN
5V/div
VEN
5V/div
VOUT
1V/div
VOUT
1V/div
IOUT
500mA
/div
Time 1ms/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
VEN
5V/div
VOUT
1V/div
VOUT
1V/div
Time 1ms/div
Time 10ms/div
Figure 22. Switch Turn-off and Fall Time
(VIN=5.0V, COUT=4.7μF, No Load)
Mar. 2013
Figure 23. Switch Turn-off and Fall Time
(VIN=3.3V, COUT=100μF, No Load)
Rev 2. 0
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Typical Performance Characteristics (Continued)
VEN
5V/div
VEN
5V/div
VOUT
1V/div
VOUT
1V/div
IOUT
500mA
/div
Time 10ms/div
Time 500µs/div
Figure 24. Switch Turn-off and Fall Time
(VIN=5.0V, COUT=100μF, No Load)
VEN
5V/div
Figure 25. Switch Turn-off and Fall Time
(VIN=3.3V, COUT=100μF, RL=10Ω)
VOUT
2V/div
VOUT
1V/div
IOUT
500mA
/div
IOUT
1A/div
Time 100μs/div
Time 500µs/div
Figure 26. Switch Turn-off and Fall Time
(VIN=5.0V, COUT=100μF, RL=10Ω)
Mar. 2013
Figure 27. Resistance Load Inrush Response
(COUT=4.7μF, RL=1.65Ω)
Rev 2. 0
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Typical Performance Characteristics (Continued)
VEN
5V/div
VEN
5V/div
VOUT
2V/div
IOUT
1A/div
IOUT
1A/div
Time 200μs/div
Time 100ms/div
Figure 28. Short-circuit Current,
Device Enable into Short
(VIN=5.0V, COUT=4.7μF)
Mar. 2013
Figure 29. Thermal Shutdown Response
(VIN=5.0V, COUT=4.7μF, RL=1.65Ω)
Rev 2. 0
BCD Semiconductor Manufacturing Limited
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Typical Application
Note 2: 4.7μF input capacitor is enough in most application cases.
If the PCB trace of power rail to VIN is long, larger input capacitor is necessary.
Figure 30. AP2821 Typical Application
Mar. 2013
Rev 2. 0
BCD Semiconductor Manufacturing Limited
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Mechanical Dimensions
SOT-23-5
Unit: mm(inch)
0.300(0.012)
0.600(0.024)
1.500(0.059)
1.700(0.067)
0.100(0.004)
0.200(0.008)
3.000(0.118)
2.650(0.104)
2.820(0.111)
3.100(0.122)
0.200(0.008)
0.700(0.028)
REF
0.300(0.012)
0.500(0.020)
0°
8°
1.800(0.071)
2.000(0.079)
0.000(0.000)
MAX
1.450(0.057)
0.950(0.037)
TYP
0.150(0.006)
0.900(0.035)
1.300(0.051)
Mar. 2013
Rev 2. 0
BCD Semiconductor Manufacturing Limited
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Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
Mounting Pad Layout
SOT-23-5
E2
G
Z
E1
Y
X
Dimensions
Value
Mar. 2013
Z
(mm)/(inch)
3.600/0.142
G
(mm)/(inch)
1.600/0.063
X
(mm)/(inch)
0.700/0.028
Rev 2. 0
Y
(mm)/(inch)
1.000/0.039
E1
(mm)/(inch)
0.950/0.037
E2
(mm)/(inch)
1.900/0.075
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