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參數(shù)資料
| 型號： | LT3495EDDB#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.78 A SWITCHING REGULATOR, PDSO10 |
| 封裝： | 3 X 2 MM, LEAD FREE, PLASTIC, MO-229WECD-1, DFN-10 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 299K |
| 代理商： | LT3495EDDB#TRPBF |
LT3495/LT3495B/
LT3495-1/LT3495B-1
1
3495b1b1fa
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
650mA/350mA Micropower
Low Noise Boost Converter
with Output Disconnect
The LT3495/LT3495B/LT3495-1/LT3495B-1 are low noise
boost converters with integrated power switch, feedback
resistor and output disconnect circuitry. The parts control
power delivery by varying both the peak inductor current
and switch off-time. This novel* control scheme results
in low output voltage ripple as well as high efciency
over a wide load range. For the LT3495/LT3495-1, the
off-time of the switch is not allowed to exceed a xed
level, guaranteeing the switching frequency stays above
the audio band for the entire load range. The parts feature
a high performance NPN power switch with a 650mA
and 350mA current limit for the LT3495/LT3495B and
LT3495-1/LT3495B-1 respectively. The quiescent current
is a low 60μA, which is further reduced to less than 0.1μA
in shutdown. The internal disconnect circuitry allows the
output voltage to be isolated from the input during shut-
down. An auxiliary reference input (CTRL pin) overrides
the internal 1.235V feedback reference with any lower
value allowing full control of the output voltage during
operation. The LT3495 series are available in a tiny 10-lead
3mm
× 2mm DFN package.
OLED Power Supply from One Li-Ion Cell
n Low Quiescent Current
60μA in Active Mode
0.1μA in Shutdown Mode
n Low Noise Control Scheme (Switching Frequency
Always Stays Above Audible Range for LT3495/-1)
n Integrated Power NPN:
650mA Current Limit (LT3495/B)
350mA Current Limit (LT3495-1/B-1)
n Integrated Output Disconnect
n Integrated Output Dimming
n Wide input range: 2.5V to 16V
n Wide output range: Up to 40V
n Integrated feedback resistor
n Tiny 10-Lead 3mm
× 2mm DFN Package
n OLED Power
n Low Noise Power
n MP3 Player
Output Voltage Ripple
vs Load Current
Efciency vs Load Current
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. *Patent pending.
LOAD CURRENT (mA)
0.1
V
OUT
PEAK-TO-PEAK
RIPPLE
(mV)
50
40
20
30
10
0
1
3495 TA01b
100
10
1.0μF 0603
CAPACITOR AT VOUT
2.2μF 1206
CAPACITOR AT VOUT
SW
CAP
VCC
SHDN
CTRL
VOUT
FB
GND
909k
3495 TA01a
LT3495
4.7μF
1μF
10μH
2.2μF
ONE
Li-Ion
CELL
VOUT
16V
70mA
LOAD CURRENT (mA)
EFFICIENCY
(%)
POWER
LOSS
(mW)
3495 TA01c
90
80
50
60
70
40
400
320
80
160
240
0
0.1
10
100
1
VIN = 3.6V
LOAD FROM CAP
LOAD FROM VOUT
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