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参数资料
| 型号： | LTC3709EUH#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/24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
TYPICAL PERFOR A CE CHARACTERISTICS
350
300
250
200
150
100
50
0
Maximum Current Sense
Threshold Voltage vs V RNG
0
–20
–40
–60
–80
–100
–120
–140
Minimum Current Sense
Threshold Voltage vs V RNG
0.5
0.8
1.1
1.4
1.7
2.0
0.5
0.8
1.1
1.4
1.7
2.0
V RNG (V)
3709 G19
V RNG (V)
3709 G20
PI FU CTIO S
(QFN/SSOP)
RUN/SS (Pin 1/Pin 6): Run Control and Soft-Start Input.
A capacitor to ground at this pin sets the ramp rate of the
output voltage (approximately 0.5s/ μ F) and the time delay
for overcurrent latch-off (see Applications Information).
Forcing this pin below 1.4V shuts down the device.
I TH (Pin 2/Pin 7): Error Amplifier Compensation Point. The
current comparator threshold increases with this control
voltage. The voltage ranges from 0V to 2.4V with 0.8V
corresponding to zero sense voltage (zero current).
V FB (Pin 3/Pin 8): Error Amplifier Feedback Input. This pin
connects to the error amplifier input. It can be used to
attach additional compensation components if desired.
TRACK (Pin 4/Pin 9): Tie the TRACK pin to a resistive
divider connected to the output of another LTC3709 for
either coincident or ratiometric output tracking (see Appli-
cations Information). To disable this feature, tie the pin to
V CC . Do Not Float this pin.
SGND (Pins 5, 6, 33/Pins 10, 11): Signal Ground. All
small-signal components such as C SS and compensation
components should connect to this ground and eventually
connect to PGND at one point. The Exposed Pad of the QFN
package must be soldered to PCB ground.
V OS– (Pin 7/Pin 12): The (–) Input to the Differential
Amplifer.
DIFFOUT (Pin 8/Pin 13): The Output of the Differential
Amplifier.
V OS+ (Pin 9/Pin 14): The (+) Input to the Differential
Amplifier.
EXTLPF (Pin 10/Pin 15): Filter Connection for the PLL.
This PLL is used to synchronize the LTC3709 with an
external clock.
INTLPF (Pin 11/Pin 16): Filter Connection for the PLL.
This PLL is use to phase shift the second channel to the
first channel by 180 ° .
3709fb
7
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相关代理商/技术参数 |
参数描述 |
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| 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 |
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| 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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