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参数资料
| 型号： | LTC1522 |
| 厂商： | Linear Technology Corporation |
| 英文描述： | Micropower, Regulated 5V Charge Pump DC/DC Converter |
| 中文描述： | 微功耗，电压5V充电泵DC / DC转换器 |
| 文件页数： | 1/8页 |
| 文件大小： | 223K |
| 代理商： | LTC1522 |
1
LTC1522
Micropower, Regulated
5V Charge Pump
DC/DC Converter
The LTC
1522 is a micropower charge pump DC/DC
converter that produces a regulated 5V output from a 2.7V
to 5V input supply. Extremely low supply current (6
μ
A
typical with no load, <1
μ
A in shutdown) and low external
parts count (one 0.22
μ
F flying capacitor and two 10
μ
F
capacitors at V
IN
and V
OUT
) make the LTC1522 ideally
suited for small, light load battery-powered applications.
Typical efficiency (V
IN
= 3V) exceeds 75% with load
currents between 50
μ
A and 20mA. Modulating the SHDN
pin keeps the typical efficiency above 75% with load
currents all the way down to 10
μ
A.
The LTC1522 has thermal shutdown and can survive a
continuous short from V
OUT
to GND. In shutdown the
load is disconnected from V
IN
. The part is available in
8-pin MSOP and SO packages. The LTC1522 is pin
compatible with the LTC1516 in applications where
V
IN
≥
2.7V and I
OUT
≤
20mA.
I
Ultralow Power: Typical Operating I
CC
= 6
μ
A
I
Short-Circuit/Thermal Protected
I
Regulated 5V
±
4% Output Voltage
I
2.7V to 5V Input Range
I
No Inductors
I
Very Low I
CC
in Shutdown: <1
μ
A
I
Output Current:10mA (V
IN
≥
2.7V)
20mA (V
IN
≥
3V)
I
Shutdown Disconnects Load from V
IN
I
Internal Oscillator: 700kHz
I
Compact Application Circuit (<0.1 in
2
)
I
8-Pin MSOP and SO Packages
FEATURES
DESCRIPTIO
N
U
APPLICATIO
S
U
I
SIM Interface Supplies for GSM Cellular Telephones
I
Li-Ion Battery Backup Supplies
I
Local 3V to 5V Conversion
I
Smart Card Readers
I
PCMCIA Local 5V Supplies
TYPICAL APPLICATIO
N
U
1
2
3
4
8
7
6
5
NC
SHDN
GND
C
–
NC
V
IN
V
OUT
C
+
LTC1522
ON/OFF
10
μ
F
10
μ
F
V
OUT
= 5V
±
4%
I
OUT
= 0mA TO 10mA, V
IN
≥
2.7V
I
OUT
= 0mA TO 20mA, V
IN
≥
3V
0.22
μ
F
V
2.7V TO 5V
+
+
1522 TA01
Regulated 5V Output from a 2.7V to 5V Input
Efficiency vs Output Current
OUTPUT CURRENT (mA)
50
60
70
80
90
E
100
1522 TA02
0.01
0.1
1
10
SHDN = 0V
V
IN
= 3V
LOW I
MODE
(SEE FIGURE 2)
, LTC and LT are registered trademarks of Linear Technology Corporation.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1522CMS8 | 功能描述:IC REG SWITCHED CAP 5V 8MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC1522CMS8#PBF | 功能描述:IC REG SWITCHED CAP 5V 8MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LTC1522CMS8#TR | 功能描述:IC REG SWITCHED CAP 5V 8MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC1522CMS8#TRPBF | 功能描述:IC REG SWITCHED CAP 5V 8MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC1522CS8 | 功能描述:IC REG SWITCHED CAP 5V 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:500 系列:- 类型:切换式电容器（充电泵），反相 输出类型:固定 输出数:1 输出电压:-3V 输入电压:2.3 V ~ 5.5 V PWM 型:Burst Mode? 频率 - 开关:900kHz 电流 - 输出:100mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 细型，TSOT-23-6 包装:带卷 (TR) 供应商设备封装:TSOT-23-6 其它名称:LTC1983ES6-3#TRMTR |
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