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參數(shù)資料
| 型號(hào)： | LT3437 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Panels; For Use With:EUROCARD Subracks RoHS Compliant: Yes |
| 中文描述： | 高電壓，200kHz降壓500mA的降壓開關(guān)穩(wěn)壓器以100？的靜態(tài)電流 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大小： | 523K |
| 代理商： | LT3437 |
LT3437
1
3437f
, 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 6498466. **See
Burst Mode Operation section for conditions.
LOAD DUMP
COLD CRANK
V
IN
20V/DIV
V
20mV/DIV
AC COUPLED
V
IN
0V
3437 TA03
50ms/DIV
I
OUT
250mA
■
High Voltage Power Conversion
■
14V and 42V Automotive Systems
■
Industrial Power Systems
■
Distributed Power Systems
■
Battery-Powered Systems
■
Powered Ethernet
■
Wide Input Range: 3.3V to 60V
■
Load Dump (Input Transient) Protection to 80V
■
500mA Peak Switch Current
■
Burst Mode
Operation: 100
μ
A Quiescent Current**
■
Low Shutdown Current: I
Q
< 1
μ
A
■
Burst Mode Operation Defeat
■
200kHz Switching Frequency
■
Saturating Switch Design: 0.8
On-Resistance
■
Peak Switch Current Maintained Over
Full Duty Cycle Range*
■
1.25V Feedback Reference Voltage
■
Easily Synchronizable
■
Soft-Start Capability
■
Small 10-Pin Thermally Enhanced DFN Package
High Voltage 500mA, 200kHz
Step-Down Switching Regulator
with 100
μ
A Quiescent Current
DESCRIPTIOU
The LT
3437 is a 200kHz monolithic buck switching
regulator that accepts input voltages up to 80V. A high
efficiency 500mA, 0.8
switch is included on the die along
with all the necessary oscillator, control and logic cir-
cuitry. Current mode topology is used for fast transient
response and good loop stability.
Innovative design techniques along with a new high volt-
age process achieve high efficiency over a wide input
range. Efficiency is maintained over a wide output current
range by employing Burst Mode operation at low currents,
utilizing the output to bias the internal circuitry, and by
using a supply boost capacitor to fully saturate the power
switch. Burst Mode operation can be defeated by a logic
high signal on the SYNC pin which results in lower light
load ripple at the expense of light load efficiency. Patented
circuitry maintains peak switch current over the full duty
cycle range.* Shutdown reduces input supply current to
less than 1
μ
A. External synchronization can be imple-
mented by driving the SYNC pin with logic-level inputs. A
single capacitor from the C
SS
pin to the output provides a
controlled output voltage ramp (soft-start).
The LT3437 is available in a low profile (0.75mm) 3mm
×
3mm 10-pin DFN package or a 16-Pin TSSOP Package
both with exposed pad leadframes for low thermal
resistance.
V
IN
SHDN
BOOST
V
BIAS
LT3437
2.2
μ
F
100V
CER
330pF
0.1
μ
F
0.1
μ
F
100
μ
H
BAS21
SYNC
GND
100
μ
F
6.3V
TANT
V
3.3V
400mA
V
IN
4.5V TO 80V*
10MQ100N
1500pF
25k
165k
100k
3437 TA01
27pF
SW
C
SS
V
C
FB
*FOR INPUT VOLTAGES ABOVE 60V RESTRICTIONS APPLY
14V to 3.3V Step-Down Converter with
100
μ
A No Load Quiescent Current
Supply Current vs Input Voltage
FEATURES
APPLICATIU
TYPICAL APPLICATIO
U
INPUT VOLTAGE (V)
0
0
S
μ
A
40
100
10
20
30
40
3435 TA02
50
200
20
60
80
120
140
160
180
80
60
70
Input Voltage
Transient Response
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3437_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Voltage 500mA, 200kHz Step-Down Switching Regulator with 100μA Quiescent Current |
| LT3437EDD | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 3.3V to 60V 10-Pin DFN EP |
| LT3437EDD#PBF | 功能描述:IC REG BUCK ADJ 0.5A 10DFN 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 |
| LT3437EDD#TRPBF | 功能描述:IC REG BUCK ADJ 0.5A 10DFN 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 |
| LT3437EFE | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 3.3V to 60V 16-Pin TSSOP EP |
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