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| 型号： | LTC3409EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.6A 8DFN |
| 标准包装： | 121 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.62 V ~ 5.5 V |
| 输入电压： | 1.6 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1.7MHz ~ 2.6MHz |
| 电流 - 输出： | 600mA |
| 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： | 8-WFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 8-DFN-EP（3x3） |
| 产品目录页面： | 1334 (CN2011-ZH PDF) |
LTC3409
600mA Low V IN Buck
Regulator in 3mm × 3mm DFN
FEATURES
DESCRIPTION
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1.6V to 5.5V Input Voltage Range
Internal Soft-Start
Selectable 1.7MHz or 2.6MHz Constant Frequency
Operation
Internal Oscillator can be Synchronizable to an
External Clock, 1MHz to 3MHz Range
High Ef?ciency: Up to 95%
Very Low Quiescent Current: Only 65μA During
Burst Mode ? Operation
600mA Output Current (V IN = 1.8V, V OUT = 1.2V)
750mA Peak Inductor Current
No Schottky Diode Required
Low Dropout Operation: 100% Duty Cycle
0.613V Reference Voltage
Stable with Ceramic Capacitors
Shutdown Mode Draws <1μA Supply Current
Current Mode Operation for Excellent Line and Load
Transient Response
Overtemperature Protection
Available in a Low Pro?le (0.75mm) 8-Lead
(3mm × 3mm) DFN Package
The LTC ? 3409 is a high ef?ciency, monolithic synchronous
buck regulator using a constant frequency, current mode
architecture. The output voltage is adjusted via an external
resistor divider.
Fixed switching frequencies of 1.7MHz and 2.6MHz are
supported. Alternatively, an internal PLL will synchronize
to an external clock in the frequency range of 1MHz to
3MHz. This range of switching frequencies allows the
use of small surface mount inductors and capacitors,
including ceramics.
Supply current during Burst Mode operation is only
65μA dropping to <1μA in shutdown. The 1.6V to 5.5V
input voltage range makes the LTC3409 ideally suited
for single cell Li-Ion, Li-Metal and 2-cell alkaline, NiCd
or NiMH battery-powered applications. 100% duty cycle
capability provides low dropout operation, extending bat-
tery life in portable systems. Burst Mode operation can be
user-enabled, increasing ef?ciency at light loads, further
extending battery life.
The internal synchronous switch increases ef?ciency and
eliminates the need for an external Schottky diode. Internal
Cellular Phones
APPLICATIONS
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soft-start offers controlled output voltage rise time at start-
up without the need for external components.
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Digital Cameras
MP3 Players
, 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 5481178, 6580258, 6304066, 6127815,
6498466, 6611131.
TYPICAL APPLICATION
100
90
Burst Mode Ef?ciency, 1.8V OUT
2.5V IN , BURST
1.0
High Ef?ciency Step-Down Converter
80
70
4.2V IN , BURST
0.1
V IN
1.8V TO 5.5V
4.7μF
CER
LTC3409
V IN SW
RUN
MODE V FB
SYNC GND
2.2μH*
10pF
255k
133k
10μF
CER
V OUT
1.8V
60
50
40
30
20
3.6V IN , BURST
POWER LOST
3.6V IN , BURST
0.01
0.001
*SUMIDA CDRH2D18/LD
3409 TA01
10
0
0.0001
0.1
1
10 100
LOAD CURRENT (mA)
1000
3409 TA01b
3409fc
1
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| LTC3409IDD#PBF | 功能描述:IC REG BUCK SYNC ADJ 0.6A 8DFN 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 |
| LTC3409IDD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 0.6A 8DFN 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 |
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| LTC3410-1.875 | 制造商:LINER 制造商全称:Linear Technology 功能描述:2.25MHz, 300mA Synchronous Step-Down Regulator in SC70 |
| LTC3410B | 制造商:LINER 制造商全称:Linear Technology 功能描述:2.25MHz, 300mA Synchronous Step-Down Regulator in SC70 |
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