- 您现在的位置：买卖IC网 > PDF目录98003 > LTC3522EUD#TR (LINEAR TECHNOLOGY CORP) 0.85 A DUAL SWITCHING CONTROLLER, 1330 kHz SWITCHING FREQ-MAX, PQCC16 PDF资料下载
参数资料
| 型号： | LTC3522EUD#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.85 A DUAL SWITCHING CONTROLLER, 1330 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封装： | 3 X 3 MM, PLASTIC, M0-220WEED-2, QFN-16 |
| 文件页数： | 1/20页 |
| 文件大小： | 270K |
| 代理商： | LTC3522EUD#TR |
LTC3522
1
3522f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Synchronous 400mA
Buck-Boost and 200mA
Buck Converters
The LTC
3522 combines a 400mA buck-boost DC/DC con-
verter with a 200mA synchronous buck DC/DC converter in
a tiny 3mm
×3mmpackage.The1MHzswitchingfrequency
minimizes the solution footprint while maintaining high
efciency. Both converters feature internal soft-start and
compensation, simplifying the design process.
The buck converter is current mode controlled and utilizes
an internal synchronous rectier for high efciency. The
buck converter supports 100% duty cycle operation to
extend battery life. If the PWM pin is held low, the buck
converter automatically transitions from Burst Mode opera-
tion to PWM mode. With the PWM pin held high, the buck
converter remains in low noise, 1MHz PWM mode.
The buck-boost converter provides continuous conduc-
tion operation to maximize efciency and minimize noise.
At light loads, the buck-boost converter can be placed in
Burst Mode operation to improve efciency and reduce
no-load standby current.
The LTC3522 provides a 1μA shutdown mode, overtem-
perature shutdown and current limit protection on both
converters. The LTC3522 is available in a 16-pin low prole
3mm
× 3mm QFN package.
■ Dual High Efciency DC/DC Converters:
Buck-Boost (VOUT: 2.2V to 5.25V, IOUT: 400mA
for VIN > 3V, VOUT = 3.3V)
Buck (VOUT: 0.6V to VIN, IOUT: 200mA)
■ 2.4V to 5.5V Input Voltage Range
■ Pin Selectable Burst Mode
Operation
■ 25μA Total Quiescent Current for Both Converters in
Burst Mode Operation
■ Independent Power Good Indicator Outputs
■ Integrated Soft-Start
■ Thermal and Overcurrent Protection
■ <1μA Quiescent Current in Shutdown
■ Small 0.75mm
× 3mm × 3mm QFN Package
■ Flash-Based MP3 Players
■ Medical Instruments
■ Digital Cameras
■ PDAs, Handheld PCs
■ Personal Navigation Devices
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6404251 and 6166527.
+
PVIN1 PVIN2
SW2
FB2
VOUT1
LTC3522
SHDN2
1M
137k
68.1k
L1: COILCRAFT MSS6132-8.2
μH
L2: COILCRAFT MSS6132-4.7
μH
4.7
μF
6.8
μF
4.7
μF
12pF
Li-Ion
L2
4.7
μH
L1
8.2
μH
VOUT1
3.3V
300mA
(400mA
VIN > 3V)
VOUT2
1.8V
200mA
VIN
2.4V TO 4.2V
432k
3522 TA01a
SHDN1
PWM
SW1A
SW1B
FB1
PGOOD2
PGOOD1
PGND1 GND PGND2
ON
OFF
PWM
BURST
VIN (V)
2.4
EFFICIENCY
(%)
92
94
96
98
5.4
3522 TA01b
88
90
86
84
82
80
76
78
74
72
70
3.4
4.4
100
BUCK-BOOST
IOUT = 100mA
VOUT = 3.3V
BUCK
IOUT = 100mA
VOUT = 1.8V
Efciency vs VIN
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3525LESC6-3#PBF | 0.45 A SWITCHING REGULATOR, PDSO6 |
| LTC3526LEDC | SWITCHING CONTROLLER, 1250 kHz SWITCHING FREQ-MAX, PDSO6 |
| LTC3531ES6-3.3#PBF | 0.46 A SWITCHING REGULATOR, PDSO6 |
| LTC3538EDCB#TRM | 0.8 A SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO8 |
| LTC3542IS6#PBF | SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3523 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters |
| LTC3523EUD#PBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 16QFN 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 |
| LTC3523EUD#TRPBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 16QFN 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:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC3523EUD-2#PBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 16QFN 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:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC3523EUD-2#TRPBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 16QFN 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:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
发布紧急采购，3分钟左右您将得到回复。