ACE500E

ACE500E
Fast Transient Response LDO with Adjustable Output Voltage
Description
ACE500E is a 500mA low noise and fast transient response liner regulator with adjustable output voltage
and ultra low dropout voltage. Its output voltage is programmed by a resistor divider, and can be as low as
0.8V, which satisfies the most advanced ICs which may require supply voltage to be 0.9V – 1.2V.
ACE500E is consists of a precise voltage reference, an error amplifier, a compensation network
and a
low ON-resistance power P-MOSFET. It also integrates many protection circuitry, like current limit and
over-temperature protection module.
Features
•
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•
•
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•
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500mA output current
Adjustable output voltage
Minimum output voltage as low as 0.8V
Ultra low dropout voltage 370mV @ 500mA
Low quiescent current 40uA
<1uA shutdown current
Short-circuit protection
Over-temperature protection
Accuracy ±1%;±2%
Applications
•
•
Any battery powered electronic devices
Other AC powered device which needs an adjustable output voltage thru LDOs
Absolute Maximum Ratings
Parameter
Symbol
VIN Voltage
-0.3V~8V
All Other Pin Voltage
VIN-0.3V~VIN0.3
VIN to GND Current
Internally limited
Operating Temperature Range
-40~85℃
Storage Temperature Range
-55℃~150℃
θJA
190 ℃/W
Thermal Resistance
VER 1.1
1
ACE500E
Fast Transient Response LDO with Adjustable Output Voltage
TYPICAL APPLICATION
Packaging Type
SOT-23-5
1
5
2
6
3
Pin #
Name
Description
1
VIN
Input voltage pin, connect a 1uF capacitor to GND
2
GND
Ground
3
EN
Enable pin. Pull this pin “high” to turn on the chip and “low” to turn off
4
FB
Feedback pin. Feedback voltage is set to be 0.8V. Output voltage is
programmed by a resistor divider from Vout thru FB to GND, and by the
equation 0.8V x R1+R2/ R2= Vout
5
VOUT
Output voltage pin, connect a 2.2uF capacitor to GND
Ordering information
ACE500E X XX + H
Halogen - free
Pb - free
BN:SOT-23-5
A:± 1%
B:± 2%
VER 1.1
2
ACE500E
Fast Transient Response LDO with Adjustable Output Voltage
Electrical Characteristics
(VIN = 5V, unless otherwise specified. Typical values are at TA = 25ºC.)
Parameter
Conditions
INPUT Range
Min
Typ
2.5
Quiescent Current (Iq)
Vfb=1V
Feedback Voltage (Vfb)
Max
Units
6.0
V
40
0.775
0.8
uA
0.825
mV
Iout=100mA
75
Iout=300mA
225
Iout=500mA
370
Line Regulation
2.5V < Vin <5.5
0.075
%/V
Load Regulation
0mA < Iout < 500mA
0.6
%/A
Maximum Output Current (Iout_Max)
Vin – Vout = 1V
0.9
Dropout Voltage (Vdrop)
Current Limit
1.05
1.05
EN logic “high” Voltage
Voltage to turn on the chip
EN logic “low” Voltage
Voltage to turn off the chip
Thermal Protection
Ripple Rejection
mV
F=100Hz, Ripple=0.5Vp-p
VIN= Set VOUT+1V
A
A
1.5
V
0.5
V
150
℃
65
dB
Typical Performance Characteristics
(Typical values are at TA = 25℃ unless otherwise specified.)
Dropout Voltage Vin=5V
Dropout Voltage Vin=3.5V
VER 1.1
3
ACE500E
Fast Transient Response LDO with Adjustable Output Voltage
Typical Performance Characteristics
(Typical values are at TA = 25℃ unless otherwise specified.)
Dropout Voltage Vin=2V
Line Regulation Vout=3.3V
Line Regulation Vout=0.8V
Quiescent current Vout=3.3V
Load Regulation Vout=3.3V
Load Regulation Vout=0.8V
VER 1.1
4
ACE500E
Fast Transient Response LDO with Adjustable Output Voltage
Packing Information
SOT-23-5
VER 1.1
5
ACE500E
Fast Transient Response LDO with Adjustable Output Voltage
Notes
ACE does not assume any responsibility for use as critical components in life support devices or systems
without the express written approval of the president and general counsel of ACE Electronics Co., LTD.
As sued herein:
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and shoes failure to perform when properly used in
accordance with instructions for use provided in the labeling, can be reasonably expected to result in
a significant injury to the user.
2. A critical component is any component of a life support device or system whose failure to perform can
be reasonably expected to cause the failure of the life support device or system, or to affect its safety
or effectiveness.
ACE Technology Co., LTD.
http://www.ace-ele.com/
VER 1.1
6