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參數(shù)資料
| 型號： | LTC3409 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | DRAM |
| 英文描述： | 64 x 18 3.3-V asynchronous FIFO memory 56-SSOP 0 to 70 |
| 中文描述： | 600mA的低輸入電壓降壓穩(wěn)壓器x 3mm DFN封裝采用3mm |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 246K |
| 代理商： | LTC3409 |
1
LTC3409
3409f
■
Cellular Phones
■
Digital Cameras
■
MP3 Players
High Efficiency Step-Down Converter
600mA Low V
IN
Buck
Regulator in 3mm
×
3mm DFN
DESCRIPTIOU
The LTC
3409 is a high efficiency, monolithic synchro-
nous 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, includ-
ing ceramics.
Supply current during Burst Mode operation is only 65
μ
A
dropping to <1
μ
A 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 battery life in
portable systems. Burst Mode operation can be user-
enabled, increasing efficiency at light loads, further ex-
tending battery life.
The internal synchronous switch increases efficiency and
eliminates the need for an external Schottky diode. Inter-
nal soft-start offers controlled output voltage rise time at
start-up without the need for external components.
■
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 Efficiency: Up to 95%
■
Very Low Quiescent Current: Only 65
μ
A 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 <1
μ
A Supply Current
■
Current Mode Operation for Excellent Line and Load
Transient Response
■
Overtemperature Protection
■
Available in a Low Profile (0.75mm) 8-Lead
(3mm
×
3mm) DFN Package
APPLICATIU
Burst Mode Efficiency, 1.8V
OUT
FEATURES
TYPICAL APPLICATIO
U
V
IN
RUN
MODE
SYNC
SW
V
FB
GND
LTC3409
2.2
μ
H*
V
1.8V
255k
4.7
μ
F
CER
V
IN
1.8V TO 5.5V
133k
*SUMIDA CDRH2D18/LD
3409 TA01
10pF
10
μ
F
CER
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark 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)
30
E
P
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3409 TA01b
0
1.0
0.1
0
1
2.5V
IN
, BURST
4.2V
IN
, BURST
3.6V
IN
, BURST
POWER LOST
3.6V
IN
, BURST
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3409A | 制造商:LINER 制造商全稱:Linear Technology 功能描述:600mA Low VIN Buck Regulator in 3mm × 3mm DFN |
| LTC3409AEDD | 制造商:LINER 制造商全稱:Linear Technology 功能描述:600mA Low VIN Buck Regulator in 3mm × 3mm DFN |
| LTC3409AEDD#PBF | 功能描述:IC REG BUCK SYNC ADJ 0.6A 8DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LTC3409AEDD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 0.6A 8DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LTC3409AIDD | 制造商:LINER 制造商全稱:Linear Technology 功能描述:600mA Low VIN Buck Regulator in 3mm × 3mm DFN |
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