LXDC2HL-G Series
Micro DC-DC converter
1. Features
Low EMI noise and small footprint (5mm
2
) using inductor-embedded ferrite substrate
PFM/PWM automatic mode switching function
Smooth mode transient between PFM mode and PWM mode with low-ripple-voltage
PFM mode
2% DC voltage accuracy over full load current range
Wide input voltage range : 2.3~5.5V
Fixed output voltage : 0.8V – 2. 5V (factory setting)
Internal soft start, overcurrent protection
2. Description
The LXDC2HL series is a low power step-down DCDC converter, which is suitable for a space-limited or a noise-
sensitive application. The device utilizes an inductor-embedded ferrite substrate, and the substrate eliminates
radiated EMI noise and conduction noise efficiently.
By just putting input/output capacitors, it can be used as a LDO replacement. Its low noise feature and easy to
assembly feature assures reliable power supply quality.
The device works in PFM mode at light load and it extends the battery life. At heavy load, its control mode
changes to PMW mode automatically and it keeps high efficiency using synchronous rectifying technology. The
device keeps good output voltage accuracy even in PFM mode. It keeps 2% DC voltage accuracy over full
current range, and shows very smooth mode transient between PFM mode and PWM mode.
3. Typical Application Circuit
LXDC2HL-G
LXDC2HL
Enable
EN
Vin
GND
10uF
Vout
Vout
VBAT
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July. 2015
LXDC2HL-G Series
Micro DC-DC converter
2
EN
Input
This is the ON/OFF control pin of the device.
Connecting this pin to GND keeps the device in shutdown mode.
Pulling this pin to Vin enables the device with soft start.
This pin must not be left floating and must be terminated.
If this pin is left open, the device may be off around 100mA output.
EN=H: Device ON, EN=L: Device OFF
Regulated voltage output pin.
Apply output load between this pin and GND.
Ground pin
3
4
Vout
GND
Output
-
4-3. Functional Block Diagram
5. Ordering Information
Part number
LXDC2HL10G-301
LXDC2HL11G-306
LXDC2HL12G-302
LXDC2HL13G-441
LXDC2HL15G-303
LXDC2HL18G-304
LXDC2HL25G-341
Output Voltage
1.0V
1.1V
1.2V
1.3V
1.5V
1.8V
2.5V
Device Specific Feature
Standard Type
Standard Type
Standard Type
Standard Type
Standard Type
Standard Type
Standard Type
MOQ
T/R, 3000pcs/R
T/R, 3000pcs/R
T/R, 3000pcs/R
T/R, 3000pcs/R
T/R, 3000pcs/R
T/R, 3000pcs/R
T/R, 3000pcs/R
6. Electrical Specification
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July. 2015
LXDC2HL-G Series
Micro DC-DC converter
6-1 Absolute maximum ratings
Parameter
Input voltage
Operating ambient temperature
Operating IC temperature
Storage temperature
6-2 Electrical characteristics (Ta=25℃)
Parameter
Input voltage
UVLO voltage
Input leak current
Symbol
V
in
UVLO
lin-off
Vin=3.7V, EN=0V
LXDC2HL10G-301
LXDC2HL11G-306
LXDC2HL12G-302
Output voltage
accuracy
Vin-Vout>1V
Vout
LXDC2HL13G-441
LXDC2HL15G-303
LXDC2HL18G-304
Vin-Vout>0.7V
LXDC2HL25G-341
0.976
1.076
1.176
1.274
1.47
1.764
2.45
0
0
0
0
0
0
0
15
15
15
15
15
15
mVpp
Condition
Min.
2.3
1.0
Typ.
3.7
1.4
0
1.0
1.1
1.2
1.3
1.5
1.8
2.5
Max.
5.5
1.8
2
1.024
1.124
1.224
1.326
1.53
1.836
2.55
300
250
250
250
200
200
200
mA
V
Unit
V
V
uA
symbol
Vin, EN
Ta
T
IC
rating
6.3
-40 to +85
-40 to +125
-40 to +85
Unit
V
o
C
o
C
o
T
STO
C
LXDC2HL10G-301
LXDC2HL11G-306
LXDC2HL12G-302
Load current range
Iout
LXDC2HL13G-441
LXDC2HL15G-303
LXDC2HL18G-304
LXDC2HL25G-341
LXDC2HL10G-301
LXDC2HL11G-306
Ripple voltage
Vrpl
Vin=3.7V,
Iout=50mA,
BW=100MHz
LXDC2HL12G-302
LXDC2HL13G-441
LXDC2HL15G-303
LXDC2HL18G-304
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July. 2015
LXDC2HL-G Series
Micro DC-DC converter
LXDC2HL25G-341
LXDC2HL10G-301
LXDC2HL11G-306
LXDC2HL12G-302
Efficiency
EFF
Vin=3.7V,
Iout=100mA
LXDC2HL13G-441
LXDC2HL15G-303
LXDC2HL18G-304
LXDC2HL25G-341
VENH
EN control voltage
SW Frequency
VENL
Fosc
ON ; Enable
OFF ; Disable
1.4
0
15
80
81
82
83
85
86
90
Vin
0.25
1.2
V
V
MHz
%
LXDC2HL10G-301
LXDC2HL11G-306
LXDC2HL12G-302
LXDC2HL13G-441
OCP
Over current
protection
LXDC2HL15G-303
LXDC2HL18G-304
LXDC2HL25G-341
350
300
300
300
250
250
250
700
700
700
700
700
700
700
1350
1350
1350
1350
1350
1350
1350
mA
If the over current event continues less than Tlatch, auto-recovery.
If the over current event continues more than Tlatch, latch-up.
Restart by toggling EN voltage or Vin voltage
Tlatch
Start-up time
Ton
Latch-up mask time
@Vout=0.8×Vnom
20
0.25
usec
msec
(*1) External capacitors (Cout:10uF) shall be placed near the module in order to proper operation.
(*2)The above characteristics are tested using the test circuit on section 8.
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July. 2015