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參數資料
| 型號： | LTC3520IUF#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封裝： | 4 X 4 MM, LEAD FREE, PLASTIC, QFN-24 |
| 文件頁數： | 1/24頁 |
| 文件大小： | 311K |
| 代理商： | LTC3520IUF#PBF |
LTC3520
1
3520fa
VIN (V)
2.2
EFFICIENCY
(%)
3.7
3520 TA01b
2.7
3.2
4.2
4.7
5.2
70
75
80
85
90
95
100
BUCK-BOOST
IOUT = 150mA
BUCK
IOUT = 250mA
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Synchronous 1A
Buck-Boost and 600mA
Buck Converters
The LTC3520 combines 1A buck-boost and 600mA
synchronous buck DC/DC converters in a tiny 4mm
×
4mm package. A programmable switching frequency
allows the efciency to be optimized while minimizing
the solution footprint. Both converters feature soft-start
and current limit protection. The uncommitted gain block
can be congured as an LDO or utilized as a battery-good
comparator.
The buck converter is current mode controlled with internal
synchronous rectication to improve efciency. Pin-select-
able Burst Mode operation can be enabled to improve light
load efciency, or the buck converter can be operated in
low noise PWM mode for sensitive applications.
The buck-boost converter provides continuous conduc-
tion operation to maximize efciency and minimize noise.
At light loads, use of Burst Mode operation will improve
efciency.
The LTC3520 provides a <1μA shutdown mode and over-
temperature shutdown on both converters. The LTC3520
is available in a low prole (0.75mm) 24-lead 4mm
×
4mm QFN package.
3.3V at 500mA, 1.8V at 600mA and 1.5V at 200mA Converter
n Dual High Efciency DC/DC Converters:
Buck-Boost (VOUT: 2.2V to 5.25V, IOUT = 1A at
VOUT = 3.3V, VIN ≥ 3V)
Buck (VOUT: 0.8V to VIN, IOUT = 600mA)
n 2.2V to 5.5V Input Voltage Range
n Pin-Selectable Burst Mode Operation
n Uncommitted Gain Block for LDO Controller, Battery
Good Indication or Sequencing
n Programmable 100kHz to 2MHz Switching Frequency
n 55μA Total Quiescent Current for Both Converters in
Burst Mode Operation
n Thermal and Overcurrent Protection
n <1μA Quiescent Current in Shutdown
n 24-Lead 4mm
× 4mm QFN Package
n Portable Media Players
n Digital Cameras
n Handheld PCs, PDAs
n GPS Receivers
3520 TA01
SW1A
SW1B
VOUT1
AOUT
AIN
VOUT2
VC1
FB1
SS1
SVIN
PVIN3
PVIN2
PVIN1
PGND2
SGND
PGND1
SW2
FB2
SS2
RT
PWM1
PWM2
SD3
SD2
SD1
47μF
4.7μF
1M
309k
15k
470pF
10k
56pF
LTC3520
VOUT1
3.3V
500mA
1A FOR
VIN ≥ 3V
VOUT2
1.8V
600mA
VIN
2.2V TO
5.5V
VOUT
1.5V
200mA
10μF
0.01μF
54.9k
PWM
BURST
100k
110k
33pF
255k
27pF
200k
22μF
4.7μH
ON
OFF
Efciency vs VIN
L, LT, LTC, LTM, Linear Technology, the Linear logo 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 5481178, 6166527, 6304066, 6404251, 6580258.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC3521 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Wide VIN, 1A Buck-Boost DC/DC and Dual 600mA Buck DC/DC Converters |
| LTC3521EFE#PBF | 功能描述:IC REG BUCK BST SYNC ADJ 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關:2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應商設備封裝:6-SON（1.45x1） 產品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LTC3521EFE#TRPBF | 功能描述:IC REG BUCK BST SYNC ADJ 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
| LTC3521EFE-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Wide VIN, 1A Buck-Boost DC/DC and Dual 600mA Buck DC/DC Converters |
| LTC3521EFE-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Wide VIN, 1A Buck-Boost DC/DC and Dual 600mA Buck DC/DC Converters |
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