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參數(shù)資料
| 型號(hào)： | LTC1434I |
| 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(yè)數(shù)： | 1/20頁(yè) |
| 文件大?。?/td> | 379K |
| 代理商： | LTC1434I |
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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
a supply of 10V). The Adaptive Power output stage selec-
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 |
|---|---|
| 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 |
| LTC1435AC | 14-bit, 5V, 200KSPS, 8-Channel Unipolar ADC 24-TSSOP -40 to 85 |
| LTC1435ACG | 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 |
|---|---|
| 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(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)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(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC1434IGN#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:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)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(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC1434IGN#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:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)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(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC1434IGN#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:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)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(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC1435ACG | 功能描述:IC REG CTRLR BUCK PWM CM 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
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