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| 型号： | LT1339ISW#TR |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM CM 20-SOIC |
| 标准包装： | 1,000 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 150kHz |
| 占空比： | 90% |
| 电源电压： | 最高 60V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 包装： | 带卷 (TR) |
LT1339
High Power Synchronous
DC/DC Controller
FEATURES
DESCRIPTIO N
s
s
s
s
s
s
s
s
High Voltage: Operation Up to 60V
High Current: Dual N-Channel Synchronous Drive
Handles Up to 10,000pF Gate Capacitance
Programmable Average Load Current Limiting
5V Reference Output with 10mA External
Loading Capability
Programmable Fixed Frequency Synchronizable
Current Mode Operation Up to 150kHz
Undervoltage Lockout with Hysteresis
Programmable Start Inhibit for Power Supply
Sequencing and Protection
Adaptive Nonoverlapping Gate Drive Prevents
Shoot-Through
The LT ? 1339 is a high power synchronous current mode
switching regulator controller. The IC drives dual
N-channel MOSFETs to create a single IC solution for high
power DC/DC converters in applications up to 60V.
The LT1339 incorporates programmable average current
limiting, allowing accurate limiting of DC load current
independent of inductor ripple current. The IC also incor-
porates user-adjustable slope compensation for minimi-
zation of magnetics at duty cycles up to 90%.
The LT1339 timing oscillator operating frequency is pro-
grammable and can be synchronized up to 150kHz. Mini-
mum off-time operation provides main switch protection.
The IC also incorporates a soft start feature that is gated by
APPLICATIO N S
both shutdown and undervoltage lockout conditions.
s
s
s
s
s
s
48V Telecom Power Supplies
Personal Computers and Peripherals
Distributed Power Converters
Industrial Control Systems
Lead-Acid Battery Backup Systems
Automotive and Heavy Equipment
An output phase reversal pin allows flexibility in configu-
ration of converter types, including inverting and negative
topologies.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO N
28V to 5V 20A Buck Converter
DBST
IN5819
V IN
28V
28V to 5V Efficiency
12V IN
+
+
+
C 5VREF
1 μ F
C VC , 1nF
R CT
10k
C CT C AVG
2200pF 2200pF
C SS , 1 μ F
+
R VC , 10k
SYNC V BOOST
5V REF
CT TS
SL/ADJ
I AVG
SS
V C RUN/SHDN
TG
LT1339 BG
PGND
PHASE
CBST
1 μ F
R RUN
100k
D1
MBR0520
D2
MBR0520
+
12V
C 12VIN
47 μ F
IRL3803
IRL3103D2
× 2
C IN
1500 μ F
63V
× 3
L1
10 μ H
100
90
80
70
60
+
C REF
0.1 μ F
R FB2
1k
SGND
V FB
V REF
SENSE +
SENSE –
R FB1
3k
L1 = CTX02-13400-X2
R S
0.005 ?
C OUT
2200 μ F
6.3V
× 2
50
V OUT
5V AT 20A
0
5 10 15
OUTPUT CURRENT (A)
20
1339 TA03a
1339 TA03
sn1339 1339fas
1
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| LT1341CG | 功能描述:IC TXRX 5V RS232 W/SHTDWN 28SSOP RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LT1341CG#PBF | 功能描述:IC TXRX 5V RS232 W/SHTDWN 28SSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
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