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参数资料
| 型号： | LTC1775IS#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 16-SOIC |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 165kHz |
| 占空比： | 99% |
| 电源电压： | 4.3 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： | 16-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
LTC1775
PI FU CTIO S
EXTV CC (Pin 1): INTV CC Switch Input. When the EXTV CC
voltage is above 4.7V, the switch closes and supplies
INTV CC power from EXTV CC . Do not exceed 7V at this pin.
SYNC (Pin 2): Synchronization Input for Internal Oscilla-
tor. The oscillator will nominally run at 150kHz when open,
225kHz when tied above 1.2V, and will lock over a 1.5:1
clock frequency range.
RUN/SS (Pin 3): Run Control and Soft Start Input. A
capacitor to ground at this pin sets the ramp time to full
current output (approximately 1s/ μ F). Forcing this pin
below 1.4V shuts down the device.
FCB (Pin 4): Forced Continuous Input. Tie this pin to
ground to force synchronous operation at low load
currents, to a resistive divider from the secondary output
when using a secondary winding, or to INTV CC to enable
Burst Mode operation at low load currents.
I TH (Pin 5): Error Amplifier Compensation Point. The
current comparator threshold increases with this control
voltage, forcing inductor current to be roughly propor-
tional to V ITH . Nominal voltage range for this pin is 0V to
2.4V.
SGND (Pin 6): Signal Ground. Connect to the (–) terminal
of C OUT .
V OSENSE (Pin 7): Output Voltage Sense. Feedback input
from the remotely sensed output voltage or from an
external resistive divider across the output.
V PROG (Pin 8): Output Voltage Programming. When
V OSENSE is connected to the output, V PROG < 0.8V selects
a 3.3V output and V PROG > 3.5V selects a 5V output.
6
Leaving V PROG open allows the output voltage to be set by
an external resistive divider between the output and
V OSENSE .
PGND (Pin 9): Driver Power Ground. Connects to the
source of the bottom N-channel MOSFET, the (–) terminal
of C VCC and the (–) terminal of C IN .
BG (Pin 10): Bottom Gate Drive. Drives the gate of the
bottom N-channel MOSFET between ground and INTV CC .
INTV CC (Pin 11): Internal 5.2V Regulator Output. The
driver and control circuits are powered from this voltage.
Decouple this pin to power ground with a minimum of
4.7 μ F tantalum or other low ESR capacitor.
BOOST (Pin 12): Topside Floating Driver Supply. The (+)
terminal of the bootstrap capacitor connects here. This pin
swings from a Schottky diode drop below INTV CC to V IN +
INTV CC .
TG (Pin 13): Top Gate Drive. Drives the top N-channel
MOSFET with a voltage swing equal to INTV CC superim-
posed on the switch node voltage.
SW (Pin 14): Switch Node. The (–) terminal of the boot-
strap capacitor connects here. This pin swings from a
diode drop below ground up to V IN .
TK (Pin 15): Top MOSFET Kelvin Sense. MOSFET V DS
sensing requires this pin to be routed to the drain of the top
MOSFET separately from V IN .
V IN (Pin 16): Main Supply Input. Decouple this pin to
ground with an RC filter (1 ? , 0.1 μ F) for applications
above 3A.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1778EGN | 功能描述:IC REG CTRLR BUCK PWM CM 16-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 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 ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC1778EGN#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 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 ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC1778EGN#TR | 功能描述:IC REG CTRLR BUCK PWM CM 16-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 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 ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC1778EGN#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 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 ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC1778EGN-1 | 功能描述:IC REG CTRLR BUCK PWM CM 16-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 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 ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
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