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AX6646 Datasheet Preview

AX6646 Datasheet

300mA LDO Regulator

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AX6646
300mA LDO Regulator with Enable
GENERAL DESCRIPTION
The AX6646 is a 300mA, low quiescent, high PSRR, low noise and low dropout linear
regulator. The Device includes pass element, error amplifier, band-gap, current limit and
thermal shutdown circuitry. The characteristics of low dropout voltage and less quiescent
current make it good for some critical current application, for example, some battery
powered devices. The typical quiescent current is approximately 40µA. In the shutdown
mode, the maximum supply current is less than 1uA. The Output voltage is adjustable from
0.8V to 5.5V. Built-in current-limit, Short current protection and thermal-shutdown functions
prevent any fault condition from IC damage.
FEATURES
- Input voltage range is up to 6V
- 200mV Dropout at 150mA output current
- Guaranteed 300mA output current
- Low quiescent current 40µA (typ.)
- Adjustable Output voltage form 0.8V to 5.5V
- Maximum shutdown current <1uA
- Fast transient response
- Current limit and thermal shutdown protection
- Short circuit current fold-back
- Available in the 5-Pin Pb-Free SOT23 and TSOT-23 Package
BLOCK DIAGRAM
VIN VOUT
Current
Limit
EN Enable
Thermal
Shutdown
Error
Amp
-+
Bandgap
FB
GND
1/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2.Jan .17, 2014




AXElite

AX6646 Datasheet Preview

AX6646 Datasheet

300mA LDO Regulator

No Preview Available !

AX6646
PIN ASSIGNMENT
The package of AX6646 is SOT23-5L and TSOT-23-5L; the pin assignment is given by:
(Top View)
VIN 1
GND 2
EN 3
5 VOUT
4 FB
SOT-23-5L/TSOT-23-5L
Name
VIN
GND
EN
FB
VOUT
Description
Input voltage
Ground
Active-Low Shutdown Input. A logic
low reduces the supply current to less
than 1µA. Connect to VIN or Floating
for normal operation.
Feedback Input for Setting the Output
Voltage. Connect to an external
resistor divider for adjustable output
operation.
Regulator Output Voltage. Adjustable
from 0.8V to +5.5V.
ORDER/MARKING INFORMATION
Order Information
AX6646 XX X
Package
Packing
B : SOT-23-5L Blank:Bulk
BT : TSOT-23-5L A : Taping
Top Marking (SOT-23-5L/TSOT-23-5L)
L 8Y WX
AX6646
ID code:internal
WW:01~26 (A~Z)
27~52 (a~z)
Year: A=2010
1=2011
ABSOLUTE MAXIMUM RATINGS (at TA=25°C)
Characteristics
Symbol
Rating
VIN Pin Voltage
VIN GND - 0.3 to + 6.5
Output Voltage
EN Pin Voltage
VOUT GND - 0.3 to VIN + 0.3
VEN GND - 0.3 to + 6.5
FB Pin Voltage
VFB GND - 0.3 to + 6.5
Power Dissipation
PD 400
Storage Temperature Range
TST -40 to +150
Operating Junction Temperature
TJ -40 to +125
Thermal Resistance from Junction to case
θJC 180
Thermal Resistance from Junction to ambient
θJA
250
Note : θJA is measured with the PCB copper area of approximately 1 in2(Multi-layer).
Unit
V
V
V
V
mW
°C
°C
°C/W
°C/W
2/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2.Jan .17, 2014


Part Number AX6646
Description 300mA LDO Regulator
Maker AXElite
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AX6646 Datasheet PDF






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