AP7168-SPG-13 Diodes Inc, AP7168-SPG-13 Datasheet - Page 7

• Manufacturer Part Number: AP7168-SPG-13
• Description: IC REG LDO ADJ 1.2A 8SOP
• Manufacturer: Diodes Inc

Specifications of AP7168-SPG-13

• Regulator Topology: Positive Adjustable
• Voltage - Output: 0.8 ~ 5 V
• Voltage - Input: 2.2 ~ 5.5 V
• Voltage - Dropout (typical): 0.5V @ 1A
• Number Of Regulators: 1
• Current - Output: 1.2A (Max)
• Current - Limit (min): 1.2A
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOP
• Input Voltage Max: 5.5 V
• Output Voltage: 0.8 V to 5 V
• Output Type: Adjustable
• Dropout Voltage (max): 800 mV
• Output Current: 1.2 A
• Line Regulation: 0.02 %
• Load Regulation: 1.5 %
• Voltage Regulation Accuracy: 3 %
• Maximum Power Dissipation: 1.9 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AP7168-SPG-13DITR

Typical Performance Characteristics
Application Note
Input Capacitor
A 1μF ceramic capacitor is recommended to connect
between IN and GND pins to decouple input power supply
glitch and noise. The amount of the capacitance may be
increased without limit. A lower ESR (Equivalent Series
Resistance) capacitor allows the use of less capacitance,
while higher ESR type requires more capacitance. This
input capacitor should be located as close as possible to
the device to assure input stability and less noise. For
PCB layout, a wide copper trace is required for both IN
and GND.
Output Capacitor
The output capacitor is required to stabilize and help the
transient response of the LDO. The AP7168 is designed to
have excellent transient response for most applications
with a small amount of output capacitance. The AP7168 is
stable for all available types and values of output
capacitors ≥ 4.7μF. The device is also stable with multiple
capacitors in parallel, which can be of any type of value.
Additional capacitance helps to reduce undershoot and
overshoot during transient. This capacitor should be
placed as close as possible to OUT and GND pins for
optimum performance.
Adjustable Operation
The AP7168 provides output voltage from 0.8V to 5.0V
through external resistor divider as shown below.
AP7168
Document number: DS32019 Rev. 2 - 2
1.8
1.7
1.6
1.5
1.4
-50
-25
Current Limit vs. Temperature
(Continued)
Temperature (
0
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1.2A LOW DROPOUT REGULATOR WITH POK
7 of 11
25
o
The output voltage is calculated by:
Where V
Rearranging the equation will give the following equation
to find the approximate resistor divider values:
To maintain the stability of the internal reference voltage,
R
C)
50
2
VIN =2.8V,Vout=1.8V
VIN =3.3V,Vout=1.8V
needs to be kept smaller than 250kΩ.
V
IN
C
IN
REF
75
=0.8V (the internal reference voltage)
100kOhm
Enable
V
R
100
OUT
1
POK
EN
IN
=
=
R
AP7168
V
2
REF
⎛
⎜ ⎜
⎝
V
V
OUT
GND
OUT
FB
REF
⎛
⎜ ⎜
⎝
1
+
R
R
−
R
1
2
R
1
AP7168
2
1
© Diodes Incorporated
⎞
⎟ ⎟
⎠
September 2010
⎞
⎟ ⎟
⎠
V
OUT
C
OUT