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參數(shù)資料
| 型號： | LTC3704EMS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Wide Input Range, No RSENSE Positive-to-Negative DC/DC Controller |
| 中文描述： | 0.05 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 1/28頁 |
| 文件大?。?/td> | 350K |
| 代理商： | LTC3704EMS |
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LTC3704
sn3704 3704fs
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIOU
Wide Input Range, No R
SENSE
Positive-to-Negative DC/DC Controller
TM
The LTC
3704 is a wide input range, current mode,
positive-to-negative DC/DC controller that drives an
N-channel power MOSFET and requires very few external
components. Intended for low to high power applications,
it eliminates the need for a current sense resistor by
utilizing the power MOSFET’s on-resistance, thereby maxi-
mizing efficiency.
The IC’s operating frequency can be set with an external
resistor over a 50kHz to 1MHz range, and can be synchro-
nized to an external clock using the MODE/SYNC pin.
Burst Mode operation at light loads, a low minimum
operating supply voltage of 2.5V and a low shutdown
quiescent current of 10
μ
A make the LTC3704 ideally
suited for battery-operated systems.
For applications requiring constant frequency operation,
the Burst Mode operation feature can be defeated using
the MODE/SYNC pin. Higher than 36V switch voltage
applications are possible with the LTC3704 by connecting
the SENSE pin to a resistor in the source of the power
MOSFET.
The LTC3704 is available in the 10-lead MSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
I
High Efficiency Operation (No Sense
Resistor Required)
I
Wide Input Voltage Range: 2.5V to 36V
I
Current Mode Control Provides Excellent Transient
Response
I
High Maximum Duty Cycle (Typ 92%)
I
±
1% Internal Voltage Reference
I
±
2% RUN Pin Threshold with 100mV Hysteresis
I
Micropower Shutdown: I
Q
= 10
μ
A
I
Programmable Switching Frequency
(50kHz to 1MHz) with One External Resistor
I
Synchronizable to an External Clock Up to 1.3
×
f
OSC
I
User-Controlled Pulse Skip or Burst Mode
Operation
I
Internal 5.2V Low Dropout Voltage Regulator
I
Capable of Operating with a Sense Resistor for High
Output Voltage Applications (V
DS
>36V)
I
Small 10-Lead MSOP Package
I
SLIC Power Supplies
I
Telecom Power Supplies
I
Portable Electronic Equipment
I
Cable and DSL Modems
I
Router Supplies
Burst Mode is a registered trademark of Linear Technology Corporation.
No R
SENSE
is a trademark of Linear Technology Corporation.
RUN
I
TH
NFB
FREQ
MODE/SYNC
SENSE
V
IN
INTV
CC
GATE
GND
LTC3704
R
80.6k
1%
R
1.21k
R1
1M
C
VCC
4.7
μ
F
M1
C
IN
, C
: TDK C5750X5R1C476M
C
OUT
: TDK C5750X5R0J107M
C
VCC
: TAIYO YUDEN LMK316BJ475ML
Figure 1. High Efficiency Positive to Negative Supply
D1
L1*
L2*
C
OUT
100
μ
F
(X2)
V
5V to 15V
V
–5.0V
3A to 5A
GND
D1: MBRD835L (ON SEMICONDUCTOR)
L1, L2: BH ELECTRONICS BH510-1009
M1: Si4884 (SILICONIX/VISHAY)
R
C
3k
C
C1
4.7nF
C
IN
47
μ
F
1
2
3
4
5
6
7
8
10
9
C
DC
47
μ
F
3704 TA01
1%
R
3.65k
1%
Conversion Efficiency
OUTPUT CURRENT (A)
0.001
E
0.1
10
100
90
80
70
60
50
40
30
20
3704 TA01b
0.01
1.0
V
IN
= 15V
V
IN
= 5V
V
IN
= 10V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3704EMS#PBF | 功能描述:IC REG CTRLR INV PWM CM 10-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| LTC3704EMS#PBF | 制造商:Linear Technology 功能描述:IC, DC/DC CONTROLLER, 300kHz, MSOP-10 |
| LTC3704EMS#TR | 功能描述:IC REG CTRLR INV PWM CM 10-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC3704EMS#TRPBF | 功能描述:IC REG CTRLR INV PWM CM 10-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC3704EMSPBF | 制造商:Linear Technology 功能描述:2.5-36Vin No RSENSE Pos-Neg DC/DC MSOP10 |
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