XC6601
Series
Low Voltage Input LDO Voltage Regulator with Soft-Start Function
■GENERAL
DESCRIPTION
ETR0335_007
The XC6601 series is a low voltage input CMOS LDO regulator which provides highly accurate (±20mV) outputs and can
supply current efficiently due to its ultra low on-resistance even at low output voltages. The series is ideally suited to the
applications which require very low dropout voltage operation and consists of a voltage reference, an error amplifier, a driver
transistor, a current limiter, a fold back circuit, a thermal shutdown (TSD) circuit, an under voltage lock out (UVLO) circuit,
soft-start circuit and a phase compensation circuit.
Output voltage is selectable in 0.05V increments within a range of 0.7V to 1.8V using laser trimming technology and ceramic
capacitors can be used for the output stabilization capacitor (C
L
).
The over current protection circuit (the current limiter and the fold back circuit) as well as the thermal shutdown circuit (the
TSD circuit) are built-in. These two protection circuits will operate when either the output current reaches the current limit
level or the junction temperature reaches the temperature limit level.
With the built-in UVLO function, the regulator output is forced OFF when the voltage level at the V
BIAS
pin or the V
IN
pin falls
below the UVLO voltage level. With the soft-start function, the inrush current from V
IN
to V
OUT
for charging C
L
at start-up can
be reduced and makes the V
IN
stable.
The CE function enables the output to be turned off and the series to be put in stand-by mode resulting in greatly reduced
power consumption. At the time of entering the stand-by mode, the series enables the electric charge at the output capacitor
(C
L
) to be discharged via the internal auto-discharge switch which is located between the V
OUT
pin and the V
SS
pin. As a
result the V
OUT
pin quickly returns to the V
SS
level.
■APPLICATIONS
●Smart
phones / Mobile phones
●Portable
game consoles
●Digital
still cameras / Camcorders
●Digital
audio equipment
●Mobile
devices / treminals
■FEATURES
Maximum Output Current
Dropout Voltage
Bias Voltage Range
Input Voltage Range
Output Voltage Range
Output Voltage Accuracy
Power Consumption
UVLO
TSD (Detect/Release)
Soft-Start Time
Operating Temperature Range
Function
Low ESR Capacitor
Packages
Environmentally Friendly
: 400mA
(Limit:550mA TYP.)
: 38mV@I
OUT
=100mA (TYP.)
(at V
BIAS
-
V
OUT
=2.4V)
:
2.5V ~ 6.0V
(V
BIAS
- V
OUT
≧1.2V)
: 1.0V ~ 3.0V(V
IN
≦
V
BIAS
)
: 0.7V ~ 1.8V
(0.05V increments)
:±20mV
: I
BIAS
=25μA , I
IN
=1.0μA (TYP.)
I
BIAS
=0.01μA , I
IN
=0.01μA (TYP.)
: V
BIAS
=2.0V, V
IN
=0.4V (TYP.)
: 150℃/125℃ (TYP.)
: 240μs @ V
OUT
=1.2V (TYP.)
: -40℃ ~ +85℃
: C
L
High Speed Auto-Discharge
: Ceramic Capacitor Compatible
: USP-6C, SOT-25, SOT-89-5
: EU RoHS Compliant, Pb Free
■
TYPICAL APPLICATION CIRCUIT
■
TYPICAL PEFORMANCE
CHARACTERISTICS
●V
BIAS
=3.6V , V
IN
=1.8V , V
OUT
=1.5V
●Dropout
Voltage vs. Output Current
XC 6 6 0 1 B 1 2 1 M R
Ta=25 [℃]
300
250
Dropout Voltage: Vdif(mV)
200
150
100
50
0
0
100
200
Output Current: IOUT(mA)
300
400
VBIAS=3.0V
VBIAS=3.3V
VBIAS=3.6V
VBIAS=4.2V
VBIAS=5.0V
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XC6601
Series
■PIN
CONFIGURATION
●USP-6C
●SOT-25
V
OUT
5
CE
4
●SOT-89-5
1
V
IN
*
The heat dissipation pad of the USP-6C
2
V
BIAS
SOT-25
(TOP VIEW)
3
V
SS
package is recommended to solder as the
recommended mount pattern and metal
mask pattern for mounting strength. This
pad should be electrically opened or
connected to the V
BIAS
(No.1) pin.
■PIN
ASSIGNMENT
PIN NUMBER
USP-6C
1
3
4
2
6
SOT-25
2
1
5
3
4
SOT-89-5
2
4
5
3
1
PIN NAME
V
BIAS
V
IN
V
OUT
V
SS
CE
FUNCTION
Power Supply Input
Driver Transistor Input
Output
Ground
ON/OFF Control
■
PRODUCT CLASSIFICATION
●Ordering
Information
XC6601①②③④⑤⑥-⑦
(*1)
:
CE High Active, Soft-Start Function Built-in, CL Auto Discharge Function
MARK
①
②③
DESCRIPTION
Type of Regulators
Output Voltage
Output Voltage
Type
SYMBOL
A
B
07 ~ 18
1
B
MR
MR-G
⑤⑥-⑦
Packages
Taping Type
(*2)
ER
ER-G
PR
PR-G
DESCRIPTION
Pull-Down Resistor Built-in
No Pull-Down Resistor Built-in
e.g.) V
OUT(T)
=1.2V⇒②=1,③=2
0.1V increments
e.g.) 1.2V⇒②=1,③=2,④=1
0.05V increments
e.g.) 1.25V⇒②=1,③=2,④=B
SOT-25
SOT-25
USP-6C
USP-6C
SOT-89-5
SOT-89-5
④
(*1)
(*2)
The ”-G” suffix indicates that the products are Halogen and Antimony free as well as being fully EU RoHS compliant.
The device orientation is fixed in its embossed tape pocket.
For reverse orientation, please contact your local Torex sales office or representative.
(Standard orientation:
⑤R-⑦,
Reverse orientation:
⑤L-⑦)
2/33
Real-time operating system RTOS
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