LXDC3EP series 1. Features

LXDC3EP  series  1. Features
LXDC3EP series
Micro DCDC converter
1. Features







Step-Down DCDC Converter
Low EMI noise and small footprint using inductor-imbedded ferrite substrate
High efficiency using synchronous rectifier technology and PFM/PWM auto-select function
Input voltage range : 2.5 - 5.5V
Output voltage range : 1.0 - 3.3V
Maximum Load Current : 1A
Switching frequency : 4MHz
2. Mechanical details
BOTTOM VIEW
TOP VIEW
SIDE VIEW
unit (mm)
Symbol
Dimension
Symbol
Dimension
L
3.5+/- 0.2
a
0.2+/- 0.2
W
3.2+/- 0.2
b
0.8+/- 0.1
T
1.3MAX
c
0.4+/- 0.1
d
0.7+/- 0.1
e
0.6+/- 0.1
Pin configuration
Pin number
1
Symbol
I/O
EN
Input
Function
ON/OFF control pin
H: Enable
L: Disable
2,3,5,6,9
GND
-
4
Vout
Output
7
MODE
Input
GND pin
Voltage output pin
Operation mode select pin
H: Forced PWM mode,
L: PFM/PWM mode
8
Vin
Input
Voltage input pin
1
February.2012
LXDC3EP series
Micro DCDC converter
3. Ordering Information
Part number
Output Voltage
Device Specific Feature
MOQ
LXDC3EP10A-176
1.0V
T/R,1000pcs/R
LXDC3EP12A-104
1.2V
T/R,1000pcs/R
LXDC3EP15A-105
1.5V
T/R,1000pcs/R
LXDC3EP18A-106
1.8V
T/R,1000pcs/R
LXDC3EP25A-109
2.5V
T/R,1000pcs/R
LXDC3EP33A-107
3.3V
T/R,1000pcs/R
4. Electrical Specification
4-1 Absolute maximum ratings
Parameter
symbol
rating
Vin
6.0
Maximum input voltage
Operating temperature
TOP
Storage temperature
TSTO
Unit
V
-30 to +85
o
-30 to +85
o
C
C
4-2 Electrical Characteristics (Ta=25 oC)
Parameter
Symbol
Condition
Min.
Typ.
Max.
2.5
3.7
5.5
Unit
LXDC3EP10A-176
LXDC3EP12A-104
Operational
Input voltage
UVLO
Output voltage
Load Current
Vin
LXDC3EP15A-105
V
LXDC3EP18A-106
LXDC3EP25A-109
3.0
3.7
5.5
LXDC3EP33A-107
4.0
5.0
5.5
UVLO
Vout
2.2
PWM Mode
Vin-Vout>0.7V
V
LXDC3EP10A-176
0.976
1.0
1.024
LXDC3EP12A-104
1.176
1.2
1.224
LXDC3EP15A-105
1.47
1.5
1.53
LXDC3EP18A-106
1.764
1.8
1.836
LXDC3EP25A-109
2.45
2.5
2.55
LXDC3EP33A-107
3.234
3.3
3.366
0
-
1000
Iout
V
mA
2
February.2012
LXDC3EP series
Micro DCDC converter
Parameter
Symbol
Condition
Min.
Typ.
Max.
-
15
-
Unit
LXDC3EP10A-176
Vin=3.7V
Io=1000mA
W=20MHz
Ripple Voltage
Vrpl
LXDC3EP12A-104
LXDC3EP15A-105
LXDC3EP18A-106
Vin=3.7V
Io=1000mA
W=20MHz
Vin=5.0V
Io=1000mA
W=20MHz
mV(p-p)
LXDC3EP25A-109
-
20
-
LXDC3EP33A-107
-
20
-
LXDC3EP10A-176
82
86
-
LXDC3EP12A-104
84
88
LXDC3EP15A-105
86
90
-
LXDC3EP18A-106
88
92
-
LXDC3EP25A-109
90
94
-
LXDC3EP33A-107
90
94
-
ENon
1.2
-
-
ENoff
-
-
0.4
MODE-H
1.2
-
-
MODE-L
-
-
0.4
Frequency
Freq
-
4
-
MHz
Over Current
Protection
OCP
1000
1200
1700
mA
Start -up Time
Ton
Efficiency
EFF
Vin=3.7V
Io=300mA
Vin=5.0V
Io=300mA
Enable Voltage
MODE Voltage
-
170
-
%
V
V
usec
3
February.2012
LXDC3EP series
Micro DCDC converter
4-3 Output Current Derating
This product is used by the following temperature derating.
Thermal Derating
Vin<5V
1200
Iout [mA]
1000
800
600
400
200
0
-40
-20
0
20
40
60
80
100
Ta [℃ ]
4
February.2012
LXDC3EP series
Micro DCDC converter
5. Test Circuit
MODE
EN
Vin
Vout
LXDC3EP
Vin
V-MODE
(C)
V-EN
GND
RL
*Optional:Cout: 4.7uF/6.3V (LXDC3EP33A-107)
6. Reference Land Pattern
unit (mm)
Symbol
Dimension
Symbol
Dimension
a
0.8
c
0.7
b
0.4
d
0.6
5
February.2012
LXDC3EP series
Micro DCDC converter
7. Measurement Data
Micro DCDC Converter evaluation board (P2LX0457B)
Measurement setup
Enable SW
Mode SW
GND_S
VIN_S
GND
V
VIN
A
V
VOUT_S
GND_S
Load
VOUT
GND
A
6
February.2012
LXDC3EP series
Micro DCDC converter
Typical Measurement Data (reference purpose only)
(Ta=25℃)
Efficiency
Vin=3.7V, Vout=1.2V
100
100
90
90
80
80
70
70
EFF [%]
EFF [%]
Vin=3.7V, Vout=1.0V
60
60
50
50
40
40
30
30
1
10
100
1,000
1
10
Iout [mA]
1,000
100
1,000
100
1,000
Vin=3.7V, Vout=1.8V
100
100
90
90
80
80
70
70
EFF [%]
EFF [%]
Vin=3.7V, Vout=1.5V
60
60
50
50
40
40
30
30
1
10
100
1,000
1
10
Iout [mA]
Iout [mA]
Vin=3.7V, Vout=2.5V
Vin=5.0V, Vout=3.3V
100
100
90
90
80
80
70
70
EFF [%]
EFF [%]
100
Iout [mA]
60
60
50
50
40
40
30
30
1
10
100
1
1,000
10
Iout [mA]
Iout [mA]
7
February.2012
LXDC3EP series
Micro DCDC converter
Road Requlation
Vin=3.7V, Vout=1.2V
1.02
1.224
1.01
1.212
Vout [V]
Vout [V]
Vin=3.7V, Vout=1.0V
1
1.2
1.188
0.99
1.176
0.98
0
100
200
300
400
500
0
600
100
200
400
500
600
400
500
600
400
500
600
Vin=3.7V, Vout=1.8V
1.53
1.836
1.515
1.818
Vout [V]
Vout [V]
Vin=3.7V, Vout=1.5V
1.5
1.485
1.8
1.782
1.47
1.764
0
100
200
300
400
500
600
0
100
200
Iout [mA]
300
Iout [mA]
Vin=3.7V, Vout=2.5V
Vin=5.0V, Vout=3.3V
2.55
3.366
2.525
3.333
Vout [V]
Vout [V]
300
Iout [mA]
Iout [mA]
2.5
2.475
3.3
3.267
2.45
3.234
0
100
200
300
400
500
600
0
Iout [mA]
100
200
300
Iout [mA]
8
February.2012
LXDC3EP series
Micro DCDC converter
Output Ripple-Noise
Vin=3.7V, Vout=1.2V
60
60
50
50
40
40
Vrpl [mVpp]
Vrpl [mVpp]
Vin=3.7V, Vout=1.0V
30
20
10
30
20
10
0
0
0
200
400
600
800
1000
0
200
400
Iout [mA]
800
1000
Vin=3.7V, Vout=1.8V
60
60
50
50
40
40
Vrpl [mVpp]
Vrpl [mVpp]
Vin=3.7V, Vout=1.5V
30
20
10
30
20
10
0
0
0
200
400
600
800
1000
0
200
400
Iout [mA]
600
800
1000
800
1000
Iout [mA]
Vin=3.7V, Vout=2.5V
Vin=5.0V, Vout=3.3V
60
60
50
50
40
40
Vrpl [mVpp]
Vrpl [mVpp]
600
Iout [mA]
30
20
10
30
20
10
0
0
0
200
400
600
800
1000
0
Iout [mA]
200
400
600
Iout [mA]
Note:
1. This datasheet's specifications are subject to change or our products in it may be discontinued without advance notice. Please check with
our sales representatives or product engineers before ordering.
2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product
specifications or transact the approval sheet for product specifications before ordering.
9
February.2012
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