XC6601
Series
Low Voltage Input LDO Voltage Regulators
■GENERAL
DESCRIPTION
ETR0335_003
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 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.
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
●Mobile
phones
●Cordless
phones
●Wireless
communication equipment
●Portable
games
●Cameras
●Audio
visual equipment
●Portable
AV equipment
●PDAs
■FEATURES
Bias Voltage Range
Maximum Output Current
Dropout Voltage
: 400mA
(Limiter 550mA TYP.)
: 38mV@I
OUT
=100mA (TYP.)
(at V
BIAS
-
V
OUT
=2.4V)
:
2.5V ~ 6.0V
(V
BIAS
- V
OUT
≧1.2V)
Input Voltage Range
Output Voltage Range
Output Voltage Accuracy
Power Consumption
UVLO
TSD (Detect/Release)
Operating Temperature Range
C
L
High Speed Auto-Discharge
Low ESR Capacitor
Packages
: 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.)
: -40℃ ~ 85℃
: Ceramic Capacitor Compatible
: USP-6C, SOT-25, SOT-89-5
■
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
1/32
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
MARK
①
②③
DESCRIPTION
Type of
Regulators
Output Voltage
Output Voltage
Accuracy
SYMBOL
A
B
07 ~ 18
1
B
M
⑤
Packages
E
P
R
L
DESCRIPTION
: CE High Active, Pull-Down Resistor Built-in, CL Auto Discharge Function
: CE High Active, No Pull-Down Resistor Built-in, CL Auto Discharge Function
: e.g.) V
OUT(T)
=1.2V⇒②=1,③=2
: 100mV increments, ±20mV accuracy
e.g.) 1.2V⇒②=1,③=2,④=1
: 50mV increments, ±20mV accuracy
e.g.) 1.25V⇒②=1,③=2,④=B
: SOT-25
: USP-6C
: SOT-89-5
: Embossed Tape (Standard Feed)
: Embossed Tape (Reverse Feed)
④
⑥
Device Orientation
2/32
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