AX6607
600mA LDO Linear Regulator with Shutdown
GENERAL DESCRIPTION
The AX6607 is a low dropout, positive linear regulator with very low quiescent. It can
supply 600mA output current. The BP pin with a 10nF bypass capacitor can help reduce the
output noise level. 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 50μA. In the shutdown mode, the
maximum supply current is less than 2
μA
. The AX6607 regulator is able to operate with
output capacitors as small as 1μF for stability. The AX6607 series are offering several fixed
output voltage types including 1.2V, 1.5V, 1.8V, 2.5V, 2.6V, 2.7V, 2.8V, 3.0V, 3.3V and
adjustable version. Built-in current-limit and thermal-shutdown functions prevent any fault
condition from IC damage.
FEATURES
-
-
-
-
-
-
-
-
-
-
Input voltage range : 2.6V~5.5V
Adjustable and 1.2/1.5/1.8/2.5/2.6/2.7/2.8/3.0/3.3V fixed output voltages
VOUT adjust range from V
FB
to 5.0V
Guaranteed 600mA output current
Very Low quiescent current at 50μA (typ.)
Needs Only 1μF capacitor for Stability
Maximum supply current in shutdown mode <2
μA
Current limit and thermal shutdown protection
Short circuit current fold-back
Available in the SOT-23-5L and TDFN-6L Pb-Free Packages
BLOCK DIAGRAM
VIN
Error
Amp
NC
VOUT
VIN
Error
Amp
VOUT
Current
Limit
EN
Enable
- +
Current
Limit
EN
Enable
- +
Bandgap
Thermal
Shutdown
BP
GND
FB
Bandgap
Thermal
Shutdown
GND
Fixed Version
Adjustable Version
1/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.3.1 Aug.05, 2014
AX6607
PIN ASSIGNMENT
The packages of AX6607 are SOT-23-5L and TDFN-6L; the pin assignment is given by:
(Top View)
VIN
GND
EN
1
2
3
SOT-23-5L
5
VOUT
4
BP (FB)
Adjustable Version: Pin 4 is FB
Fixed Version: Pin 4 is BP
VIN EN GND
6
5
4
GND
1
2
3
VOUT BP FB/NC
TDFN-6L (2*2)
(TOP VIEW)
Description
Voltage input. The input capacitor
VIN
in the range of 1μF to 10μF is
sufficient.
GND
Ground
EN
Enable pin (Active High)
Reference Noise Bypass (The
BP
Bypass capacitor
≧1nF)
Output Voltage, The AX6607 is
VOUT stable with an output capacitor 1μF
for greater.
For adjustable output voltage
version only, the pin connects two
FB/NC resistances to decide output
voltage. When use fixed output
voltage version, this pin is NC pin.
Name
ORDER/MARKING INFORMATION
Order Information
AX6607- XX XX X
Output voltage Package
Packing
B : SOT-23-5L
Blank: Bag
Blank : ADJ
Z6 : TDFN-6L (2*2) A : Taping
12 : 1.2V
15 : 1.5V
18 : 1.8V
25 : 2.5V
26 : 2.6V
27 : 2.7V
28 : 2.8V
30 : 3.0V
33 : 3.3V
Top Marking (SOT-23-5L)
Top Marking (TDFN-6L)
LLY W X
Identification code
ID code: internal
WW : 01~26(A~Z)
27~52(a~z)
Year: A= 2010
1= 2011
2= 2012
:
:
9= 2019
LL
YWX
Output type
Refer Identification Code
ID Code: Internal
Week: 01~26(A~Z)
27~52(a~z)
Year : A = 2010
1 = 2011
2 = 2012
:
:
9 = 2019
2/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.3.1 Aug.05, 2014
AX6607
Appendix
Part Number
AX6607-ADJ
AX6607-1.2V
AX6607-1.5V
AX6607-1.8V
AX6607-2.5V
Identification Code
FA
Fh
Fi
Fk
Fm
Part Number
AX6607-2.6V
AX6607-2.7V
AX6607-2.8V
AX6607-3.0V
AX6607-3.3V
Identification Code
Fj
Fp
Fn
Fr
Fs
ABSOLUTE MAXIMUM RATINGS
(at T
A
=25 ºC)
Characteristics
Symbol
V
IN
Pin Voltage
V
IN
Output Voltage
V
OUT
Enable Voltage
V
EN
Feedback Voltage
Power Dissipation
Storage Temperature Range
Operating Temperature Range
Junction Temperature
Thermal Resistance from
Junction to case
Thermal Resistance from
Junction to ambient
SOT-23-5L
TDFN-6L
SOT-23-5L
TDFN-6L
SOT-23-5L
TDFN-6L
V
FB
PD
T
ST
T
OP
T
J
θ
JC
θ
JA
Rating
GND - 0.3 to 7
GND - 0.3 to 7
GND - 0.3 to 7
GND - 0.3 to 7
400
830
-40 to +150
-40 to +85
-40 to +125
180
25
250
120
Unit
V
V
V
V
mW
º
C
º
C
º
C
ºC/W
ºC/W
Note : θ
JA
is measured with the PCB copper area of approximately 1 in
2
(Multi-layer). That need connect to GND
(exposed pad) pin.
3/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.3.1 Aug.05, 2014
AX6607
ELECTRICAL CHARACTERISTICS
(V
IN
=5V, T
A
=25 ºC, unless otherwise noted)
Characteristics
Symbol
Conditions
Min Typ Max Units
Input Voltage
V
IN
I
OUT
=30mA
(Note1)
2.6
-
5.5 V
Quiescent Current
I
Q
I
OUT
=0mA
-
50 80 μA
Shutdown Current
I
SD
V
IN
=3.6V, I
OUT
=0mA, V
EN
=0V
-
-
1
μA
V
IN
=V
OUT
+0.1V to 5.5V
-2
-
+2
V
OUT
≧2.5V,
I
OUT
=1mA
Output Voltage Accuracy
ΔV
OUT
%
V
IN
=2.6V to 5.5V
(Fixed Version Only)
-3
-
+3
2.5V＞V
OUT
≧1.2V,
I
OUT
=1mA
Feedback Voltage
V
FB
V
IN
=2.6V to 5.5V, I
OUT
=1mA
0.784 0.8 0.816 V
FB Input Leakage Current
I
FB
V
FB
=0.8V
-100 - 100 nA
I
OUT
=600mA,
- 1400 1500
1.2V≦V
OUT
＜1.5V
I
OUT
=600mA,
- 1100 1200
1.5V≦V
OUT
≦2.1V
Dropout Voltage
V
DROP
mV
(Note2)
I
OUT
=600mA,
- 500 600
2.1V＜V
OUT
≦2.8V
I
OUT
=600mA,
- 300 500
2.8V＜V
OUT
≦3.3V
Current Limit
I
LIMIT
700 -
-
mA
Short Circuit Current
I
Short
Output Voltage < 0.375*V
OUT
- 300 -
mA
Line Regulation
ΔV
LINE
V
IN
=2.6V to 5.5V, I
OUT
=1mA
-
0.2 0.5 %
Load Regulation
(Note 3)
ΔV
LOAD
I
OUT
=10m~0.6A
-
0.5 1
%
C
IN
=1μF,
F=120Hz
-
65
-
Ripple Rejection
PSRR C
OUT
=1μF,
dB
F=1KHz
-
55
-
I
OUT
=10mA
V
ENH
1.5
-
-
Enable Input Threshold
V
V
ENL
-
-
0.4
I
ENH
V
EN
=V
IN
- 0.003 0.1
Enable Pin Current
μA
I
ENL
V
IN
=3.6V, V
EN
=0V
- 0.35 1
Temperature Shutdown
T
S
- 140 -
ºC
Temperature Shutdown
T
SH
-
30
-
ºC
Hysterisis
Note1. Minimum V
IN
voltage is defined by output adds a dropout voltage.
Note2. The dropout voltage is defined as V
IN
-V
OUT
, which is measured when V
OUT
drop about 100mV.
Note3. Regulation is measured at constant junction temperature by using pulsed testing with a low ON time.
4/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.3.1 Aug.05, 2014
AX6607
APPLICATION CIRCUIT
(1) Fixed Output Voltage Version
EN
AX6607-XX
ON
OFF
EN
V
IN
VIN
V
OUT
C
OUT
1uF
C
IN
1uF
GND
VOUT
BP
C
BP
10nF
(Option)
(2) Adjustable Output Voltage Version
EN
AX6607-Z6
ON
OFF
EN
VOUT
V
IN
VIN
V
OUT
R1
C
IN
1uF
GND BP FB/NC
C
OUT
1uF
C
BP
10nF
(Option)
R2
V
OUT
=V
FB
*(1+R1/R2)
V
FB
=0.8V
R2 Range=50K~300K
5/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.3.1 Aug.05, 2014
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