Diodes AP2318A User Manual
Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
General Description
The AP2318A is a series of ultra low dropout
regulators optimized for low voltage applications
where transient response and minimum input voltage
are critical.
The AP2318A provides current limit and thermal
shutdown function. Its circuit includes a trimmed
bandgap reference to assure output voltage accuracy to
be within ±1.5%. On-chip thermal shutdown provides
protection against any combination of overload and
ambient temperatures that would cause excessive
junction temperatures.
The AP2318A has adjustable version, which can set
the output voltage through two external resistors.
The AP2318A is available in the standard DFN-3x3-8
and PSOP-8 packages.
Features
· Wide Operating Voltage Range: 2.5V to 12V
· Output Voltage Accuracy: ±1.5%
· On-chip Thermal Shutdown
· ESD Rating: 3000V (Human Body Model)
600V (Machine Model)
· Operation Junction Temperature: -40oC to 125oC
Applications
· Notebook
· USB Device
· Add-on Card
· DVD Player
· PC Motherboard
DFN-3x3-8
Figure 1. Package Type of AP2318A
May. 2011 Rev 2. 0 BCD Semiconductor Manufacturing Limited
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PSOP-8
Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Pin Configuration
DN Package
(DFN-3x3-8)
VIN
1
VIN
2
VOUT
VOUT
3
45
Pin Description
Pin Number
DFN-3x3-8 PSOP-8
NC
EN
VIN
VIN
1
2
3
4
8
EN
NC
7
6
GND
ADJ
Figure 2. Pin Configuration of AP2318A (Top View)
Pin Name Function
MP Package
(PSOP-8)
GND
8
ADJ
7
VOUT
6
5
NC
1, 2 3, 4 VIN Input voltage
3, 4 6 VOUT Output voltage
5 7 ADJ Adjustable voltage
6 8 GND Ground
7 1, 5 NC No connection
8 2 EN On/Off control
May. 2011 Rev 2. 0 BCD Semiconductor Manufacturing Limited
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Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Functional Block Diagram
1, 2 (3, 4)
VIN VOUT
8 (2)
EN
Enable
Bandgap
Reference
V
RC
Compensation
Error
FB
Amp lifie r
Figure 3. Functional Block Diagram of AP2318A
OVP
Thermal
Shutdown
Current
Limit
3, 4 (6)
5 (7)
6 (8)
ADJ
GND
A (B)
A: DFN-3x3-8
B: PSOP-8
May. 2011 Rev 2. 0 BCD Semiconductor Manufacturing Limited
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Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Ordering Information
AP2318A -
Circuit Type
E1: Lead Free
G1: Green
Package
DN: DFN-3x3-8
MP: PSOP-8
Package
DFN-3x3-8
PSOP-8
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number , are RoHS compliant. Products with
"G1" suffix are available in green packages.
Temperature
Range
125oC
-40 to
-40 to
125oC
Lead Free Green Lead Free Green
AP2318AMP-ADJE1 AP2318AMP-ADJG1 2318A-ADJE1 2318A-ADJG1
AP2318AMP-ADJTRE1 AP2318AMP-ADJTRG1 2318A-ADJE1 2318A-ADJG1
Part Number Marking ID
AP2318ADN-ADJTRG1 B7B Tube
TR: Tape and Reel
Blank: Tube
ADJ: Adjustable Output
Packing Type
Tube
Tape & Reel
May. 2011 Rev 2. 0 BCD Semiconductor Manufacturing Limited
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