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參數資料
| 型號： | LTC3407AEMSE#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.25 A DUAL SWITCHING CONTROLLER, 1800 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | PLASTIC, MSOP-10 |
| 文件頁數： | 1/16頁 |
| 文件大?。?/td> | 263K |
| 代理商： | LTC3407AEMSE#TR |
LTC3407A
1
3407af
■ High Efficiency: Up to 96%
■ Low Ripple (35mVPK-PK) Burst Mode Operation;
IQ = 40A
■ 1.5MHz Constant Frequency Operation
■ No Schottky Diodes Required
■
Low RDS(ON) Internal Switches: 0.35
■ Current Mode Operation for Excellent Line
and Load Transient Response
■
Short-Circuit Protected
■ Low Dropout Operation: 100% Duty Cycle
■ Ultralow Shutdown Current: IQ < 1A
■
Output Voltages from 5V down to 0.6V
■ Power-On Reset Output
■ Externally Synchronizable Oscillator
■
Optional External Soft-Start
■ Small Thermally Enhanced MSOP and 3mm
× 3mm
DFN Packages
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
■ PDAs/Palmtop PCs
■ Digital Cameras
■
Cellular Phones
■ Wireless and DSL Modems
Dual Synchronous 600mA,
1.5MHz Step-Down
DC/DC Regulator
The LTC
3407A is a dual, constant frequency, synchro-
nous step-down DC/DC converter. Intended for low power
applications, it operates from a 2.5V to 5.5V input voltage
range and has a constant 1.5MHz switching frequency,
enabling the use of tiny, low cost capacitors and inductors
1mm or less in height. Each output voltage is adjustable
from 0.6V to 5V. Internal synchronous 0.35
, 1A power
switches provide high efficiency without the need for
external Schottky diodes.
A user selectable mode input is provided to allow the user
to trade-off ripple noise for low power efficiency. Burst
Mode
operation provides the highest efficiency at light
loads, while Pulse Skip Mode provides the lowest ripple
noise at light loads.
To further maximize battery life, the P-channel MOSFETs
are turned on continuously in dropout (100% duty cycle),
and both channels draw a total quiescent current of only
40
A. In shutdown, the device draws <1A.
LTC3407A Efficiency/Power Loss Curve
1mm High 2.5V/1.8V at 600mA Step-Down Regulators
RUN/SS2
VIN
VIN = 2.5V
TO 5.5V
VOUT2 = 2.5V
AT 600mA
VOUT1 = 1.8V
AT 600mA
RUN/SS1
POR
SW1
VFB1
GND
VFB2
SW2
MODE/SYNC
LTC3407A
10
F
100k
RESET
22pF
2.2
H
2.2
H
887k
442k
280k
10
F
10
F
3407A TA01
, 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.
LOAD CURRENT (mA)
1
0
EFFICIENCY
(%)
POWER
LOSS
(W)
30
20
10
70
60
50
40
100
0.0001
0.001
0.1
0.01
1
90
80
10
100
1000
3407A TA02
2.5V
VIN = 3.3V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
1.8V
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|---|---|
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC3407AEMSE-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Synchronous 600mA, 1.5MHz Step-Down DC/DC Regulator |
| LTC3407AIDD#PBF | 功能描述:IC REG BUCK SYNC ADJ 1A DL 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)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 |
| LTC3407AIDD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 1A DL 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)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 |
| LTC3407AIDD-2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Synchronous 800mA,2.25MHz Step-Down DC/DC Regulator |
| LTC3407AIDD-2#PBF | 功能描述:IC REG BUCK SYNC ADJ 1A DL 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)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 |
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