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| 型號(hào)： | LT1976 |
| 廠商： | Linear Technology Corporation |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開(kāi)關(guān)穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 1/24頁(yè) |
| 文件大?。?/td> | 797K |
| 代理商： | LT1976 |
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LT1976
1
1976f
I
High Voltage Power Conversion
I
14V and 42V Automotive Systems
I
Industrial Power Systems
I
Distributed Power Systems
I
Battery-Powered Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
*U.S. Patent 6,498,466 **See Burst Mode Operation section for conditions
I
Wide Input Range: 3.3V to 60V
I
1.5A Peak Switch Current
I
Burst Mode
Operation: 100
μ
A Quiescent Current**
I
Low Shutdown Current: I
Q
< 1
μ
A
I
Power Good Flag with Programmable Threshold
I
Load Dump Protection to 60V
I
200kHz Switching Frequency
I
Saturating Switch Design: 0.2
On-Resistance
I
Peak Switch Current Maintained Over
Full Duty Cycle Range*
I
1.25V Feedback Reference Voltage
I
Easily Synchronizable
I
Soft-Start Capability
I
Small 16-Pin Thermally Enhanced TSSOP Package
High Voltage 1.5A, 200kHz
Step-Down Switching Regulator
with 100
μ
A Quiescent Current
DESCRIPTIOU
The LT
1976 is a 200kHz monolithic buck switching
regulator that accepts input voltages up to 60V. A high
efficiency 1.5A, 0.2
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. 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 implemented 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
device also has a power good flag with a programmable
threshold and time-out and thermal shutdown protection.
The LT1976 is available in a 16-pin TSSOP package with
exposed pad leadframe for low thermal resistance.
V
IN
SHDN
V
C
BOOST
V
BIAS
FB
PGFB
PG
LT1976
4.7
μ
F
100V
CER
100pF
0.33
μ
F
0.1
μ
F
33
μ
H
4148
1
μ
F
SYNC
GND
C
T
100
μ
F
6.3V
TANT
V
3.3V
1A
V
IN
3.3V TO 60V
10MQ100N
0.047
μ
F
12.5k
165k
1%
100k
1%
1976 TA01
27pF
SW
C
SS
14V to 3.3V Step-Down Converter with
100
μ
A No Load Quiescent Current
Efficiency vs Load Current
LOAD CURRENT (A)
0.0001
0
E
20
40
60
0.001
0.01
0.1
1
1976 TA02
80
100
10
30
50
70
90
10
V
OUT
= 5V
V
OUT
= 3.3V
T
A
= 25
°
C
Supply Current vs
Input Voltage
INPUT VOLTAGE (V)
0
0
S
μ
A
50
100
10
20
30
40
1976 F05
50
150
25
75
125
60
V
OUT
= 3.3V
T
A
= 25
°
C
FEATURES
APPLICATIU
TYPICAL APPLICATIO
U
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1976EFE | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1976IFE | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT3027 | Dual 100mA, Low Dropout, Low Noise, Micropower Regulator wih Independent Inputs |
| LT3027EDD | Dual 100mA, Low Dropout, Low Noise, Micropower Regulator wih Independent Inputs |
| LT3027EMSE | Dual 100mA, Low Dropout, Low Noise, Micropower Regulator wih Independent Inputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1976B | 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:High Voltage 1.5A, 200kHz Step-Down Switching Regulator with 100μA Quiescent Current |
| LT1976BEFE | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 2.4V to 60V 16-Pin TSSOP EP |
| LT1976BEFE#PBF | 功能描述:IC REG BUCK ADJ 1.5A 16TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類(lèi)型:降壓（降壓） 輸出類(lèi)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(kāi)關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類(lèi)型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤(pán) 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤(pán) |
| LT1976BEFE#TRPBF | 功能描述:IC REG BUCK ADJ 1.5A 16TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類(lèi)型:降壓（降壓） 輸出類(lèi)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(kāi)關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類(lèi)型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤(pán) 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤(pán) |
| LT1976BIFE | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 2.4V to 60V 16-Pin TSSOP EP |
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