XC6238
Series
300mA High Speed LDO Regulator with ON/OFF Switch
ETR03106-001
■GENERAL
DESCRIPTION
The XC6238 series is a high speed LDO regulator that features high accurate, low noise, high ripple rejection, low dropout and
low power consumption. The series consists of a voltage reference, an error amplifier, a driver transistor, a current limiter, a
phase compensation circuit.
The CE function enables the circuit to be in stand-by mode by inputting low level signal. In the stand-by mode, the series
enables the electric charge at the output capacitor C
L
to be discharged via the internal switch, and as a result the V
OUT
pin
quickly returns to the V
SS
level. The output stabilization capacitor C
L
is also compatible with low ESR ceramic capacitors.
The output voltage is selectable in 0.05V increments within the range of 1.2V to 4.0V which fixed by laser trimming
technologies. The over current protection circuit is built-in. This protection circuit will operate when the output current reaches
current limit level.
■APPLICATIONS
●Mobile
devices
●Wireless
communications
●Modules
●Mobile
phones
■FEATURES
: 300mA
: 1.6½5.5V
: 2.0½4.0V（Accuracy ±1%）
1.2½1.95V（Accuracy ±20mV）
0.05V increments
Dropout Voltage
: 200mV＠I
OUT
=300mA (V
OUT
=3.0V)
Low Power Consumption
: 100μA
Stand-by Current
: 0.1μA
High Ripple Rejection
: 80dB＠f=1kHz
Protection Circuits
: Current Limit (400mA)
Short Circuit Protection
Inrush Current Protection (Type H)
Low ESR Capacitors
: C
IN
=1μF, C
L
=1μF
CE Function
: Active High, C
L
High Speed Discharge
Operating Ambient Temperature
: -40℃½+85℃
Small Package
: UFN-4A01
Environmentally Friendly
: EU RoHS Compliant, Pb Free
Maximum Output Current
Input Voltage Range
Output Voltages
■TYPICAL
APPLICATION CIRCUIT
■
TYPICAL PERFORMANCE
CHARACTERISTICS
XC6238H12
4.0
3.0
VIN = 2.2V, tr = 5μs, Ta = 25℃
VCE = 0→VIN, CIN = CL = 1.0μF (ceramic)
400
Input Voltage: VCE [V]
2.0
1.0
0.0
-1.0
-2.0
-3.0
-4.0
Time [20μs/div]
Rush Current
300
250
200
150
100
50
0
Rush Curren: IRUSH [mA]
350
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XC6238
Series
■PRODUCT
CLASSIFICATION
●Ordering
Information
XC6238①②③④⑤⑥-⑦
DESIGNATOR
①
②③
(*1)
ITEM
SYMBOL
D
H
12½40
1
DESCRIPTION
No Inrush Current Control
Inrush Current Prevention Circuit Built-in
ex.) 2.80V
→ ②=2, ③=8, ④=please
see down below.
±1％
(V
OUT
≧2.0V)
±0.02V
(V
OUT
＜2.0V)
In case of 2nd decimal place 0 (ex.2.80V
→ ④=1)
±1％
(V
OUT
≧2.0V)
±0.02V
(V
OUT
＜2.0V)
In case of 2nd decimal place 5 (ex.2.85V
→ ④=B)
UFN-4A01 (3,000pcs/Reel)
Regulator Type
Output Voltage
④
Output Voltage Accuracy
B
⑤⑥-⑦
(*1)
(*1)
Packages (Order Unit)
6R-G
The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
●Selection
Guide
TYPE
D
H
CURRENT
LIMITTER
Yes
Yes
CE PULL-
DOWN
RESISTOR
Yes
Yes
C
L
DISCHARGE
Yes
Yes
INRUSH
CURRENT
PROTECTION
No
Yes
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XC6238
Series
■PIN
CONFIGURATION
CE
3
V
IN
4
2
V
SS
1
V
OUT
UFN-4A01
(BOTTOM VIEW)
*Please not there are 2 types of metal plating of UFN-4A01 package; Au plating and Sn plating.
Au plating
Sn plating
Reference picture: Identifying the types of pin plating
* The dissipation pad for the UFN-4A01 package should be solder-plated in reference mount pattern and metal
masking so as to enhance mounting strength and heat release. If the pad needs to be connected to other pins, it
should be connected to the V
SS
(No. 2) pin.
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Analog electronics
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