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AXElite |
AX1116
150mA Ultra Low Dropout Linear Regulator
GENERAL DESCRIPTION
The AX1116 device is an efficient linear voltage regulator with better than 2% initial
voltage accuracy, very low dropout voltage and very low ground current designed
especially for hand held, battery powered applications. Other features of the device are:
TTL compatible enable/shutdown control input, current limiting and thermal shutdown.
The AX1116 is available in fixed and adjustable output voltage versions in a small
SOT-23 5-Pin package.
FEATURES
- Wide Operating range: 2.5V ~ 14V
- Adjustable and 1.8V, 2.5V, 2.8V, 3.0V, 3.3V fixed output.
- 2% Voltage Reference Accuracy
- 5uA Shutdown Current
- Stable with 2.2uF Ceramic Capacitor
- Current-Limit and Thermal Shutdown Protection
- Logic input enable pin.
- Available in STO-23-5L Pb-Free Package.
BLOCK DIAGRAM
Fixed Version
Adjustable Version
VIN VOUT VIN
Current
Limit
EN Enable
Thermal
Shutdown
Error
- + Amp
Vref=0.8V
BP GND
Current
Limit
EN Enable
Thermal
Shutdown
Error
- + Amp
Vref=0.8V
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Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.5 Nov.09, 2010
VOUT
ADJ
GND
AX1116
PIN ASSIGNMENT
The package of AX1116 is SOT-23-5L; the pin assignment is given by:
(Top View)
(Top View)
VIN 1
GND 2
EN 3
5 VOUT
4 ADJ
VIN 1
GND 2
EN 3
5 VOUT
4 BP
SOT-23-5L
Adjustable Version
SOT-23-5L
Fixed Version
Name
Description
The input pin of the regulator. Typically a large storage capacitor is
connected from this pin to ground to insure that the input voltage does
VIN
not sag below the minimum drop out voltage during the load transient
response. This pin must always be higher than VOUT by at least the
amount of the dropout voltage and some margin in order for the device
to regulate properly.
ADJ
(Adjustable Only)
A resistor divider from this pin to the VOUT pin and ground sets the output
voltage. To minimize the error due to the error amplifier, select the
values of the resistor dividers to be less than 10KΩ.
EN
Enable pin. A low signal or left open on this pin shuts down the output.
This pin must be tied High or to VIN for normal operation.
BP A 470p to 1000pF bypass capacitor connected to this pin reduces the
(Fixed Only) output noise.
VOUT
The output of the regulator. A minimum of 2.2uF with max ESR of 1Ω
capacitor must be connected from this pin to ground to insure stability.
Ground pin. This pin must be connected to the lowest potential in the
GND system and all other pins must be at higher potential with respect to this
pin.
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Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.5 Nov.09, 2010
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