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參數(shù)資料
| 型號： | LTC1434C |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 14-bit, 5V, 200KSPS, 8-Channel Unipolar ADC 24-SOIC -40 to 85 |
| 中文描述： | 四百五十○毫安，低噪聲電流模式降壓DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 379K |
| 代理商： | LTC1434C |
1
LTC1433/LTC1434
450mA, Low Noise
Current Mode Step-Down
DC/DC Converters
DESCRIPTIO
N
U
The LTC
1433/LTC1434 are monolithic pulse width modu-
lated step-down DC/DC converters. By utilizing current
mode switching techniques, they provide excellent AC and
DC load and line regulation. Both devices operate at a fixed
frequency with the LTC1434 phase-lockable to an external
clock signal.
Both devices incorporate two internal P-channel power
MOSFETs with a parallel combined resistance of 0.6
(at
tively drives one or both of the switches at frequencies up
to 700kHz to reduce switching losses and maintain high
efficiencies at low output currents.
The LTC1433/LTC1434 are capable of supplying up to
450mA of output current and boasts a
±
2.4% output
voltage accuracy. An internal low-battery detector has the
same level of accuracy as the output voltage. A power-on
reset timer (POR) is included which generates a signal
delayed by 65536/f
CLK
(300ms typ) after the output is
within 5% of the regulated output voltage.
Ideal for current sensitive applications, the devices draw
only 470
μ
A of quiescent current. In shutdown the devices
draw a mere 15
μ
A. To further maximize the life of the
battery source, the internal P-channel MOSFET switch is
turned on continuously in dropout.
I
Cellular Telephones
I
Portable Instruments
I
Wireless Modems
I
RF Communications
I
Distributed Power Systems
I
Scanners
I
Battery-Powered Equipment
I
High Efficiency: Up to 93%
I
Constant Frequency Adaptive Power
TM
Operation
I
Input Voltage Range: 3V to 13.5V
I
Internal 0.6
Power Switch (V
IN
= 10V)
I
Low Dropout Operation: 100% Duty Cycle
I
Low-Battery Detector
I
Internal Power-On Reset Timer
I
Current Mode Operation for Excellent Line and Load
Transient Response
I
Low Quiescent Current: 470
μ
A
I
Shutdown Mode Draws Only 15
μ
A Supply Current
I
±
1% Reference Accuracy
I
Available in 16- and 20-Lead Narrow SSOP
FEATURES
APPLICATIO
S
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
Adaptive Power is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
N
U
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SSW
NC
BSW
NC
SGND
RUN/SS
LBO
LBI
PWRV
IN
PGND
SV
IN
C
OSC
POR
I
TH
V
OSENSE
V
PROG
LTC1433
68
μ
F**
20V
0.1
μ
F
0.1
μ
F
100
μ
F*
10V
D1:MOTOROLA MBRS130LT3
L1:COILCRAFT D03316-104
Figure 1. High Efficiency Step-Down Converter
V
3.3V
D1
L1
100
μ
H
POWER-ON
RESET
V
3.5V TO 12V
680pF
5.1k
10k
6800pF
47pF
1433/34 F01
*AVX TPSD107M010R0100
** AVX TPSE686M020R0150
+
+
LOAD CURRENT (A)
0.001
60
E
70
80
0.01
0.1
1
1433/34 TA01
50
40
100
90
V
IN
= 5V
V
IN
= 12V
V
IN
= 9V
LTC1433 Efficiency for
V
OUT
= 3.3V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1434CGN | 14-bit, 5V, 200KSPS, 8-Channel Unipolar ADC 24-SOIC -40 to 85 |
| LTC1434I | 14-bit, 5V, 200KSPS, 8-Channel Unipolar ADC 24-SOIC -40 to 85 |
| LTC1433 | 450mA, Low Noise Current Mode Step-Down DC/DC Converters(450mA,低噪聲，脈寬調(diào)制電流型，步降DC/DC變換器) |
| LTC1434 | 450mA, Low Noise Current Mode Step-Down DC/DC Converters(450mA,低噪聲，脈寬調(diào)制電流型，步降DC/DC變換器) |
| LTC1435A | 14-bit, 5V, 200KSPS, 8-Channel Unipolar ADC 24-TSSOP -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1434CGN | 功能描述:IC REG BUCK 3.3V/5V/ADJ 20SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)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(shù):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(guān):- 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 |
| LTC1434CGN#PBF | 功能描述:IC REG BUCK 3.3V/5V/ADJ 20SSOP 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:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| LTC1434CGN#TR | 功能描述:IC REG BUCK 3.3V/5V/ADJ 20SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)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(shù):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(guān):- 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 |
| LTC1434CGN#TRPBF | 功能描述:IC REG BUCK 3.3V/5V/ADJ 20SSOP 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:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| LTC1434IGN | 功能描述:IC REG BUCK 3.3V/5V/ADJ 20SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 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:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
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