UNISONIC TECHNOLOGIES CO., LTD
L3380
PWM STEP UP DC-DC
CONTROLLER
DESCRIPTION
The L3380 is PWM step up DC-DC switching controller that
operates from 0.9V. The low start up input voltage makes L3380
specially designed for powering portable equipment from one or two
cells battery packs. This device consist of a soft start circuit, a
reference voltage source, an error amplifier, an oscillator, a phase
compensation, a PWM controller and an output drive circuit for
driving external power transistor.
Additionally, a chip enable feature is provided to power down the
converter for extended battery life. The device features a voltage
mode PWM control loop, providing stable and high efficiency
operation over a broad load current range.
2
1
CMOS IC
3
5
4
SOT-25
*Pb-free plating product number: L3380L
FEATURES
* 0.9V low start-up Input voltage at 1mA load
* Low operation current
* 0.5uA low shutdown current
* Fix
frequency
PWM at 100KHZ
* Built in PWM switching control circuit ,duty ratio is 0~83%
* Output voltage:0.1V step setting is available between 2.0V and
6.5V
* Soft start time: 6ms
* Shutdown function
APPLICATIONS
*Portable devices
*Electronic games
*Portable audio (MP3)
*Personal digital assistant (PDA)
*Digital still cameras(DSC)
*Camcorders
*White LED driver
*Single and dual-cell battery operated products
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
L3380-xx-AF5-R
L3380L-xx-AF5-R
Package
SOT-25
Packing
Tape Reel
L3380L-xx-AF5-R
(1)Packing Type
(2)Package Type
(3)Output Voltage Code
(4)Lead Plating
(1) R: Tape Reel
(2) AF5: SOT-25
(3) xx: refer to Marking Information
(4) L: Lead Free Plating Blank: Pb/Sn
,
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Copyright © 2006 Unisonic Technologies Co., Ltd
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QW-R502-099,A
L3380
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
18:1.8V
21:2.1V
25:2.5V
27:2.7V
30:3.0V
33:3.3V
40:4.0V
50:5.0V
MARKING
3
2
1
CMOS IC
SOT-25
H0
Voltage Code
Lead Plating
4
5
PIN DESCRIPTION
PIN
1
2
3
4
5
NAME
SHUTDOWN
V
OUT
NC
V
SS
EXT
FUNCTION
Shutdown control input, “H” : normal operation
“L” : stop step up( whole circuit stop).
Power supply and voltage output.
No connection.
Ground.
Switching the circuit by connecting to a transistor.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-099,A
L3380
ABSOLUTE MAXIMUM RATINGS
PARAMETER
CMOS IC
SYMBOL
RATINGS
UNIT
V
OUT
Pin Voltage
V
OUT
12
V
SHUTDOWN Pin Voltage
V
SHUTDOWN
V
SS
-0.3~12
V
EXT Pin Voltage
V
EXT
-0.3~ V
OUT
+0.3
V
EXT Pin Current
I
EXT
±80
mA
Power Dissipation
P
D
250
mW
Operating Ambient Temperature
T
OPR
-40~+85
℃
Storage Temperature
T
STG
-40~ +125
℃
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS
Refer to the test circuit, T
OPR
=25ºC, V
IN
=V
OUT
(S)*0.6, I
OUT
=V
OUT
(S)/50Ω, unless otherwise specified.
PARAMETER
TOTAL DEVICE
Output Voltage
Supply Current 1
Supply Current 2
Input Voltage
Operation Holding Voltage
Operation Start Voltage
Oscillation Start Voltage
Oscillation Frequency
Duty Ratio
Line Regulation
Load Regulation
Temperature Coefficient
Efficiency
Soft Start time
SHUTDOWN
Shutdown Supply Current
Shutdown Pin Input
Current
V
OUT
I
S1
I
S2
V
IN
V
HOLD
V
ST1
V
ST2
f
OSC
Duty
⊿LNR
⊿LDR
E
T
E
F
Ts
I
SS
I
SH
I
SL
V
IH
Shutdown Pin Input
Voltage Threshold
V
IL1
V
IL2
EXT
EXT Pin Current
I
EXTH
I
EXTL
1
1
V
EXT
=V
OUT
(S) -0.4V
V
EXT
= 0.4V
-16.1
27.4
-32.3
54.8
mA
mA
1
2
1
1
2
2
2
1
1
1
2
2
2
2
2
1
1
V
SHUTDOWN
=0
V
SHUTDOWN
=V
OUT
(S)*0.95
V
SHUTDOWN
=0
Shutdown pin “L” to “H” until
EXT output oscillating signal
Shutdown pin
V
OUT
≥1.5V
“H” to “L” until
EXT output
oscillating signal V
OUT
<1.5V
V
OUT
=V
OUT
(S)*0.95
V
OUT
=V
IN
(S)+0.5V
Measured by decreasing V
IN
voltage gradually, when
I
OUT
=1mA.
I
OUT
=1mA
Increase the V
IN
until EXT pin
output the oscillating signal
V
OUT
=V
OUT
(S)*0.95
V
OUT
=V
OUT
(S)*0.95
VIN=V
OUT
(S)*0.4 to *0.6
I
OUT
=10uA to V
OUT
(S)/50*1.25
⊿V
OUT
/(⊿T
OPR
*V
OUT
)
T
OPR
=-40℃ to +85℃
V
OUT
(S)*0.976
V
OUT
(S)
V
OUT
(S)*1.024
SYMBOL
TEST
CIRCUIT
TEST CONDITION
MIN
TYP
MAX
UNIT
V
uA
uA
V
V
39.8
6.3
66.4
12.5
10
0.7
0.9
0.8
85
75
100
83
30
30
±50
3.0
86
6.0
12.0
0.5
0.1
-0.1
0.75
0.3
0.2
115
90
60
60
V
V
KHZ
%
mV
mV
ppm/
℃
%
ms
uA
uA
uA
V
V
V
Note: V
OUT
(S) is the value of the set output voltage.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-099,A
Analogue and Mixed Signal
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