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参数资料
| 型号： | LTC3709EUH#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 32-QFN |
| 标准包装： | 2,500 |
| 系列： | PolyPhase® |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 200kHz |
| 占空比： | 90% |
| 电源电压： | 5 V ~ 36 V |
| 降压： | 是 |
| 升压： | 无 |
| 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： | 32-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
LTC3709
Fast 2-Phase, No R SENSE TM ,
Synchronous DC/DC Controller
with Tracking/Sequencing
FEATURES
DESCRIPTIO
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PolyPhase ? Valley Current Mode Controller
Synchronizable to an External Clock with PLL
Coincident or Ratiometric Tracking
Sense Resistor Optional
2% to 90% Duty Cycle at 200kHz
t ON(MIN) < 100ns
True Remote Sensing Differential Amplifier
High Efficiency at Both Light and Heavy Loads
Power Good Output Voltage Monitor
0.6V ± 1% Reference
Adjustable Current Limit
Programmable Soft-Start and Operating Frequency
Output Overvoltage Protection
Optional Short-Circuit Shutdown Timer
Available in 32-Lead (5mm × 5mm) QFN and 36-Lead
SSOP Packages
The LTC ? 3709 is a single output, dual phase, synchronous
step-down switching regulator. The controller uses a
constant on-time, valley current control architecture to
deliver very low duty cycles without requiring a sense
resistor. Operating frequency is selected by an external
resistor and is compensated for variations in input supply
voltage. An internal phase-lock loop allows the LTC3709
to be synchronized to an external clock.
A TRACK pin is provided for tracking or sequencing the
output voltage among several LTC3709 chips or an
LTC3709 and other DC/DC regulators. Soft-start is ac-
complished using an external timing capacitor.
Fault protection is provided by an output overvoltage com-
parator and an optional short-circuit shutdown timer. The
current limit level is user programmable. A wide supply
range allows voltages as high as 31V to step down as low
APPLICATIO S
as 0.6V.
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Notebook Computers
Power Supply for DSP, ASIC, Graphic Processors
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
No R SENSE is a trademark of Linear Technology Corporation.
PolyPhase is a registered trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 5481178, 6476589, 6144194, 5847554, 6100678,
6304066, 6580258, 6674274, 6462525, 6593724.
TYPICAL APPLICATIO
High Efficiency Dual Phase 1.5V/30A Step-Down Converter
5V
4.7 μ F
10 ?
324k
V IN
47.5k
1 μ F
V CC DRV CC I ON
10 μ F
35V
× 3
4.5V TO 28V
10k
0.1 μ F
100k
TRACK TG1
V RNG
FCB BOOST1
SW1
PGOOD SENSE1 +
0.22 μ F
HAT2168H
1.22 μ H
100
95
90
Efficiency and Power Loss
V IN = 12V
10
9
8
3.32k
RUN/SS
EXTLPF
BG1
SENSE1 –
HAT2165H
85
80
EFFICIENCY
7
6
100nF
680pF
20k
INTLPF PGND1
I TH LTC3709
V IN
75
70
5
4
10k
15k
SGND
V FB
DIFFOUT
V OS–
V OS+
TG2
BOOST2
SW2
SENSE2 +
BG2
SENSE2 –
PGND2
0.22 μ F
HAT2168H
HAT2165H
1.22 μ H
+
V OUT
1.5V
30A
330 μ F
2.5V
× 4
65
60
55
50
0.01
0.1
POWER LOSS
1 10
LOAD CURRENT (A)
3
2
1
0
100
3709 TA01b
3709 TA01a
3709fb
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC-3710 | 制造商:LITEON 制造商全称:Lite-On Technology Corporation 功能描述:0.3 FOUR LED CLOCK FREQUENCY DISPLAYS |
| LTC-3710E | 制造商:LITEON 制造商全称:Lite-On Technology Corporation 功能描述:0.3 FOUR LED CLOCK FREQUENCY DISPLAYS |
| LTC-3710G | 功能描述:LED 显示器和配件 4 Digit, Green RoHS:否 制造商:Avago Technologies 显示器类型:7 Segment 数位数量:2 字符大小:7.8 mm x 14.22 mm 照明颜色:Red 波长:628 nm 共用管脚:Common Anode 工作电压:2.05 V 工作电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 35 C 封装:Tube |
| LTC-3710HR | 功能描述:LED 显示器和配件 4 Digit, Red RoHS:否 制造商:Avago Technologies 显示器类型:7 Segment 数位数量:2 字符大小:7.8 mm x 14.22 mm 照明颜色:Red 波长:628 nm 共用管脚:Common Anode 工作电压:2.05 V 工作电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 35 C 封装:Tube |
| LTC-3710P | 功能描述:LED 显示器和配件 4 Digit, Red RoHS:否 制造商:Avago Technologies 显示器类型:7 Segment 数位数量:2 字符大小:7.8 mm x 14.22 mm 照明颜色:Red 波长:628 nm 共用管脚:Common Anode 工作电压:2.05 V 工作电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 35 C 封装:Tube |
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