參數(shù)資料
型號： LTC1159-3. 3
廠商： Linear Technology Corporation
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
中文描述： 射頻放大器
文件頁數(shù)： 1/20頁
文件大?。?/td> 323K
代理商： LTC1159-3. 3
1
LTC1159/LTC1159-3.3/LTC1159-5
High Efficiency Synchronous
Step-Down Switching Regulators
S
FEATURE
D
The LTC
1159 series is a family of synchronous step-down
switching regulator controllers featuring automatic Burst
Mode
TM
operation to maintain high efficiencies at low
output currents. These devices drive external complemen-
tary power MOSFETs at switching frequencies up to 250kHz
using a constant off-time current-mode architecture.
A separate pin and on-board switch allow the MOSFET
driver power to be derived from the regulated output
voltage providing significant efficiency improvement when
operating at high input voltages. The constant off-time
current-mode architecture maintains constant ripple cur-
rent in the inductor and provides excellent line and load
transient response. The output current level is user pro-
grammable via an external current sense resistor.
The LTC1159 automatically switches to power saving
Burst Mode operation when load current drops below
approximately 15% of maximum current. Standby current
is only 300
μ
A while still regulating the output and shut-
down current is a low 20
μ
A.
U
ESCRIPTIO
I
Operation from 4V to 40V Input Voltage
I
Ultra-High Efficiency: Up to 95%
I
20
μ
A Supply Current in Shutdown
I
High Efficiency Maintained Over Wide Current Range
I
Current Mode Operation for Excellent Line and Load
Transient Response
I
Very Low Dropout Operation: 100% Duty Cycle
I
Short-Circuit Protection
I
Synchronous FET Switching for High Efficiency
I
Adaptive Non-Overlap Gate Drives
I
Available in SSOP and SO Packages
I
Step-Down and Inverting Regulators
I
Notebook and Palmtop Computers
I
Portable Instruments
I
Battery-Operated Digital Devices
I
Industrial Power Distribution
I
Avionics Systems
I
Telecom Power Supplies
U
S
A
O
PPLICATI
Figure 1. High Efficiency Step-Down Regulator
LOAD CURRENT (A)
0.02
60
E
70
80
100
0.2
2
LTC1159 TA01
90
V
IN
= 10V
V
IN
= 20V
FIGURE 1 CIRCUIT
LTC1159-5 Efficiency
0.15
μ
F
V
IN
CAP
P-DRIVE
EXTV
CC
LTC1159-5
SHDN1
SHDN2
I
TH
C
T
S-GND
P-GATE
V
CC
V
CC
SENSE
–
SENSE
+
P-GND
N-GATE
0.01
μ
F
Si9410DY
0.1
μ
F
1N4148
V
IN
Si9435DY
D1
MBRS140T3
L*
33
μ
H
R
0.05
V
OUT
5V/2A
+
C
OUT
220
μ
F
+
C
100
μ
F
100V
+
3.3
μ
F
0V = NORMAL
>2V = SHUTDOWN
3300pF
C
300pF
1k
LTC1159 F01
*COILTRONICS CTX33-4-MP
U
A
O
PPLICATI
TYPICAL
Burst Mode is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
相關(guān)PDF資料
PDF描述
LTC1159-5 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
LTC1159IS RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LTC1159IS-3.3 RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LTC1159IS-5 RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1159-5 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Synchronous Step-Down Switching Regulators
LTC1159CG 功能描述:IC REG CTRLR BUCK PWM CM 20-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 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 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
LTC1159CG#PBF 功能描述:IC REG CTRLR BUCK PWM CM 20-SSOP RoHS:是 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 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 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
LTC1159CG#TR 功能描述:IC REG CTRLR BUCK PWM CM 20-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 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 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
LTC1159CG#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 20-SSOP RoHS:是 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:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR)
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