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參數(shù)資料
| 型號(hào)： | LTC1502IS8-3.3 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | Single Cell to 3.3V Regulated Charge Pump DC/DC Converter |
| 中文描述： | SWITCHED CAPACITOR REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-8 |
| 文件頁(yè)數(shù)： | 1/8頁(yè) |
| 文件大?。?/td> | 162K |
| 代理商： | LTC1502IS8-3.3 |
1
LTC1502-3.3
Single Cell to 3.3V
Regulated Charge Pump
DC/DC Converter
I
Input Voltage Range: 0.9V to 1.8V
I
0.9V Guaranteed Start-Up Voltage
I
Regulated Output Voltage: 3.3V
±
4%
I
Output Current: 10mA (V
IN
≥
1V)
I
No Inductors
I
Shutdown Disconnects Load from V
IN
I
Low Operating Current: 40
μ
A
I
Low Shutdown Current: 5
μ
A
I
Short-Circuit and Overtemperature Protected
I
Application Circuit Fits in <0.125in
2
PCB Area
I
Available in 8-Pin MSOP and SO Packages
The LTC
1502-3.3 is a quadrupler charge pump DC/DC
converter that produces a regulated 3.3V output from a
single alkaline cell input. It requires only five small external
capacitors—no inductors are required. Low supply cur-
rent (40
μ
A typical, 5
μ
A in shutdown) and minimal external
components make the LTC1502-3.3 ideal for space and
power conscious single-cell applications. The total printed
circuit board area of the circuit shown below is less than
0.125in
2
.
Forcing the C1
–
/SHDN pin low through an external resis-
tive pull-down puts the part into shutdown mode. During
shutdown, the internal oscillator is stopped and the load is
disconnected from V
IN
. An internal pull-up current on the
C1
–
/SHDN pin forces the part back into normal operation
once the pull-down resistance is removed.
The LTC1502-3.3 is short-circuit protected and survives
an indefinite V
OUT
short to ground. The LTC1502-3.3 is
available in 8-pin MSOP and SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Output Voltage vs Input Voltage
1
2
3
1502-3.3 TA01
4
8
7
1
μ
F
6
5
V
IN
GND
1
μ
F
V
SINGLE CELL
NiCd or
ALKALINE
10
μ
F
10
μ
F
10
μ
F
V
OUT
= 3.3V
I
OUT
= 10mA
LTC1502-3.3
C1
–
/SHDN
C2
C1
+
V
OUT
C3
+
C3
–
Single Cell to 3.3V DC/DC Converter
I
Pagers
I
Battery Backup Supplies
I
Portable Electronic Equipment
I
Handheld Medical Instruments
I
Glucose Meters
INPUT VOLTAGE (V)
0.8
O
3.3
3.4
3.5
1.6
1502-3.3 TA02
3.2
3.1
3.0
1.0
1.2
1.4
1.8
T
A
= 25
°
C
I
OUT
= 10mA
I
OUT
= 15mA
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
U
PCB LAYOUT FITS IN <0.125IN
2
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