參數(shù)資料
型號： LT3433IFE
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： High Voltage Step-Up/Step-Down DC/DC Converter
中文描述： 0.9 A SWITCHING REGULATOR, 230 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 4.40 MM, PLASTIC, TSSOP-16
文件頁數(shù)： 1/12頁
文件大?。?/td> 183K
代理商： LT3433IFE
1
LT3433
3433ia
High Voltage
Step-Up/Step-Down
DC/DC Converter
September 2003
DESCRIPTIO
N
U
The LT
3433 is a 200kHz fixed-frequency current mode
switching regulator that provides both step-up and step-
down regulation using a single inductor. The IC operates
over a 4V to 60V input voltage range making it suitable for
use in various wide input voltage range applications such
as automotive electronics that must withstand both load
dump and cold crank conditions.
Internal control circuitry monitors system conditions and
converts from single switch buck operation to dual switch
bridged operation when required, seamlessly changing
between step-down and step-up voltage conversion.
Optional Burst Mode
operation reduces no-load quies-
cent current to 100
μ
A and maintains high efficiencies with
light loads.
Current limit foldback and frequency foldback help pre-
vent inductor current runaway during start-up. Program-
mable soft-start helps prevent output overshoot at start-up.
The LT3433 is available in a 16-lead thermally enhanced
TSSOP package.
I
Automatic Step-Up and Step-Down Conversion
I
Uses a Single Inductor
I
Wide 4V to 60V Input Voltage Range
I
V
OUT
from 3.3V to 20V
I
Dual Internal 500mA Switches
I
100
μ
A No-Load Quiescent Current
I
Low Current Shutdown
I
±
1% Output Voltage Accuracy
I
200kHz Operating Frequency
I
Boosted Supply Pin to Saturate High Side Switch
I
Frequency Foldback Protection
I
Current Limit Foldback Protection
I
Current Limit Unaffected by Duty Cycle
I
16-lead Thermally Enhanced TSSOP Package
APPLICATIOU
I
12V Automotive Systems
I
Wall Adapter Powered Systems
I
Battery Power Voltage Buffering
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
FEATURES
TYPICAL APPLICATIO
U
V
BST
SW_H
V
IN
BURST_EN
V
C
V
FB
SW_L
PWRGND
LT3433
V
OUT
V
BIAS
SHDN
SS
SGND
1N4148
0.1
μ
F
68k
100k
0.5%
305k
0.5%
1nF100pF
2.2
μ
F
V
4V TO 60V
0.01
μ
F
3433 TA01
0.1
μ
F
1N4148
L1
100
μ
H
CoEv DU1352-101M
B120A
47
μ
F
V
OUT
5V
4V
≤
V
IN
≤
8.5V: 125mA
8.5V
≤
V
IN
≤
60V: 350mA
+
B160A
4V to 60V to 5V DC/DC Converter
with Burst Mode Operation
Final Electrical Specifications
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
OUTPUT CURRENT (mA)
40
E
60
80
90
0.1
10
100
1000
3433 TA01b
20
1
70
50
30
V
IN
= 13.8V
V
IN
= 4V
Efficiency
V
IN
(V)
0
0
M
100
200
300
400
500
10
20
30
40
3433 TA01c
50
60
BRIDGED
BUCK
V
OUT
= 5V
Maximum Output
Current vs V
IN
相關PDF資料
PDF描述
LT3433 High Voltage Step-Up/Step-Down DC/DC Converter
LT3437IDD RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
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相關代理商/技術參數(shù)
參數(shù)描述
LT3433IFE#PBF 功能描述:IC REG BUCK BST ADJ 0.5A 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(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:- 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
LT3433IFE#TR 功能描述:IC REG BUCK BST ADJ 0.5A 16TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(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:- 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
LT3433IFE#TRPBF 功能描述:IC REG BUCK BST ADJ 0.5A 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(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:- 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
LT3433IFEPBF 制造商:Linear Technology 功能描述:DC-DC Converter Step-Up/Down 60V TSSOP16
LT3434 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Voltage 3A, 200kHz Step-Down Switching Regulator with 100uA Quiescent Current
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