LXDC2HN TypeF series
Micro DC-DC converter
1. Features
2
Low EMI noise and small footprint (5mm ) using inductor-embedded ferrite substrate
High efficiency using synchronous rectifier technology at 3MHz operation
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
Maximum Load Current: 600mA (depends on output voltage)
Fixed output voltage: 0.8V – 4V (factory setting, 50mV step)
Internal soft start, overcurrent protection
Better reliability at high temperature operation compared to typeA
2. Description
The LXDC2HN series is a low power step-down DC-DC 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 (0-600mA), and shows very smooth mode transient between PFM mode and PWM mode.
LXDC2HN series has resin top coast to make it easy to be picked up in factory assembly.
TypeF uses MLCC of X6S/X6T temperature characteristics, so it is suitable for applications which need higher
reliability or higher operating temperature.
3. Typical Application Circuit
1
July 2015
LXDC2HN TypeF series
Micro DC-DC converter
4. Mechanical details
4-1 Outline
Top View
Device &Trace
Code
1 pin Mark
a
1
c
4
c
2
3
b
Bottom View
W
X X
X X X
L
Resin
Side View
T
Substrate
Unit: mm
Mark
L
W
T
a
b
c
2.5 +/- 0.2
2.0 +/- 0.2
1.3 MAX
0.85 +/- 0.1
0.60 +/- 0.1
0.15 +/- 0.15
Dimension
4-2. Pin Function
Pin
1
Symbol
Vin
I/O
Input
Description
Vin pin supplies current to the LXDC2HN internal regulator.
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
2
EN
Input
3
4
Vout
GND
Output
-
2
July 2015
LXDC2HN TypeF series
Micro DC-DC converter
4-3. Functional Block Diagram
5. Ordering Information
Part number
LXDC2HN10F-238
LXDC2HN11F-313
LXDC2HN12F-162
LXDC2HN1CF-262
LXDC2HN13F-237
LXDC2HN1DF-242
LXDC2HN15F-231
LXDC2HN18F-163
LXDC2HN23F-177
LXDC2HN25F-164
LXDC2HN28F-234
LXDC2HN30F-239
LXDC2HN33F-175
Output Voltage
1.0V
1.1V
1.2V
1.25V
1.3V
1.35V
1.5V
1.8V
2.3V
2.5V
2.8V
3.0V
3.3V
Device Specific Feature
MLCC lifetime improved type
MOQ
T/R, 2500pcs/R
T/R, 2500pcs/R
T/R, 2500pcs/R
T/R, 2500pcs/R
T/R, 2500pcs/R
T/R, 2500pcs/R
T/R, 2500pcs/R
T/R, 2500pcs/R
T/R, 2500pcs/R
T/R, 2500pcs/R
T/R, 2500pcs/R
T/R, 2500pcs/R
T/R, 2500pcs/R
MLCC lifetime improved type
MLCC lifetime improved type
MLCC lifetime improved type
MLCC lifetime improved type
MLCC lifetime improved type
MLCC lifetime improved type
MLCC lifetime improved type
MLCC lifetime improved type
MLCC lifetime improved type
MLCC lifetime improved type
MLCC lifetime improved type
MLCC lifetime improved type
# Output voltage can be set 50mV step from 0.8V to 4.0V.
Please ask Murata representative.
3
July 2015
DIY/Open Source Hardware
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