參數(shù)資料
型號(hào): LTC1517CS5-3.3#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: SWITCHED CAPACITOR REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO5
封裝: PLASTIC, SOT-23, 5 PIN
文件頁數(shù): 1/8頁
文件大?。?/td> 149K
代理商: LTC1517CS5-3.3#PBF
1
LTC1517-3.3
Micropower, Regulated
3.3V Charge Pump in a
5-Pin SOT-23 Package
FEATURES
DESCRIPTION
U
s
Ultralow Power: ICC = 6A Typ
s
Short-Circuit/Thermal Protected
s
3.3V
±4% Regulated Output
s
VIN Range: 2V to 4.4V
s
Output Current: 8mA (VIN 2V)
15mA (VIN 2.5V)
s
No Inductors
s
Ultrasmall Application Circuit (0.045in2)
s
700kHz Switching Frequency
s
Available in 5-Pin SOT-23
The LTC
1517-3.3 is a micropower charge pump DC/DC
converter that produces a regulated 3.3V output. The input
voltage range is 2V to 4.4V, allowing a single cell lithium
battery to produce a regulated 3.3V output over the entire life
of the battery. Extremely low operating current (typically 6
A
with no load) and low external parts count (one 0.1
F flying
capacitor and two small bypass capacitors at VIN and VOUT)
make the part ideally suited for small, light load battery-
powered applications. The total printed circuit board area of
the application circuit shown below is only 0.045in2.
The part operates as a Burst Mode
TM switched-capacitor
voltage doubler to produce a regulated output. The part has
thermal shutdown capability and can survive a continuous
short circuit from VOUT to GND. The device is available in a
5-pin SOT-23 package.
s
Cellular Telephones
s
Battery-Operated Equipment
s
Local Power Supplies
s
Handheld Instruments
s
PCMCIA Supplies
APPLICATIONS
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
TYPICAL APPLICATION
U
3.3
F
1517-3.3 TA01
12
3
4
5
0.1
F
6.8
F
VOUT = 3.3V ± 4%
IOUT = 8mA (VIN ≥ 2V)
IOUT = 15mA (VIN ≥ 2.5V)
VIN
2V TO 4.4V
VIN
GND
LTC1517-3.3
VOUT
C1+
C1
OUTPUT CURRENT (mA)
0
OUTPUT
VOLTAGE
(V)
40
1517 G05
10
20
30
3.40
3.35
3.30
3.25
3.20
TA = 25°C
C1 = 0.1
F
COUT = 6.8F
VIN = 2V
VIN = 2.5V
Typical Output Voltage
vs Output Current
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