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参数资料
| 型号： | LTC1142CG#TR |
| 厂商： | Linear Technology |
| 文件页数： | 7/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 28-SSOP |
| 标准包装： | 2,000 |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 250kHz |
| 占空比： | 100% |
| 电源电压： | 3.5 V ~ 18 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： | 28-SSOP（0.209"，5.30mm 宽） |
| 包装： | 带卷 (TR) |
LTC1142/LTC1142L/LTC1142HV
PI FU CTIO S
NDRIVE 1 (Pin 6): High Current Drive for Bottom N-Channel
MOSFET, Section 1. Voltage swing at Pin 6 is from ground
to V IN1 .
NC (Pins 7, 8): No Connection.
PDRIVE 2 (Pin 9): High Current Drive for Top P-Channel
MOSFET, Section 2. Voltage swing at this pin is from V IN2
to ground.
V IN2 (Pin 10): Supply pin, section 2, must be closely
decoupled to section 2 power ground, Pin 19.
C T2 (Pin 11): External capacitor C T2 from Pin 11 to ground
sets the operating frequency for the section 2. (The actual
frequency is also dependent upon the input voltage.)
INTV CC2 (Pin 12) : Internal supply voltage for section 2,
nominally 3.3V, can be decoupled to signal ground, Pin
18. Do not externally load this pin.
I TH2 (Pin 13): Gain Amplifier Decoupling Point, Section 2.
The section 2 current comparator threshold increases
with the Pin 13 voltage.
SENSE – 2 (Pin 14): Connects (–) input for the current
comparator on section 2.
SENSE + 2 (Pin 15): The (+) Input to the Section 2 Current
Comparator. A built-in offset between Pins 15 and 14 in
conjunction with R SENSE2 sets the current trip threshold
for this section.
V FB2 (Pin 16): This pin serves as the feedback pin from an
external resistive divider used to set the output voltage for
SGND2 (Pin 18): The section 2 small-signal ground must
be routed separately from other grounds to the (–) termi-
nal of the section 2 output capacitor.
PGND2 (Pin 19): The section 2 driver power ground
connects to source of the N-channel MOSFET and the (–)
terminal of the section 2 input capacitor.
NDRIVE 2 (Pin 20): High Current Drive for Bottom
N-Channel MOSFET, Section 2. Voltage swing at Pin 20 is
from ground to V IN2 .
NC (Pins 21, 22): No Connection.
PDRIVE 1 (Pin 23): High Current Drive for Top P-Channel
MOSFET, Section 1. Voltage swing at this pin is from V IN1
to ground.
V IN1 (Pin 24): Supply Pin, Section 1. Must be closely
decoupled to section 1 power ground Pin 5.
C T1 (Pin 25): External capacitor C T1 from Pin 25 to ground
sets the operating frequency for section 1. (The actual
frequency is also dependent upon the input voltage.)
INTV CC1 (Pin 26): Internal supply voltage for section 1,
nominally 3.3V, can be decoupled to signal ground, Pin 4.
Do not externally load this pin.
I TH1 (Pin 27): Gain Amplifier Decoupling Point, Section 1.
The section 1 current comparator threshold increases
with the Pin 27 voltage.
SENSE – 1 (Pin 28): Connects to the (–) input for the
current comparator on section 1.
section 2.
SHDN2 (Pin 17): When grounded, the section 2 regulator
operates normally. Pulling Pin 17 high holds both MOSFETs
off and puts section 2 in micropower shutdown mode.
Requires CMOS logic signal with t r , t f < 1 μ s. Do not “float”
Pin 17.
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1142HV | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual High Efficiency Synchronous Step-Down Switching Regulators |
| LTC1142HV-ADJ | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual High Efficiency Synchronous Step-Down Switching Regulators |
| LTC1142HVCG | 功能描述:IC REG CTRLR BUCK PWM CM 28-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:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 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 ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC1142HVCG#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-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:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 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 ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC1142HVCG#TR | 功能描述:IC REG CTRLR BUCK PWM CM 28-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:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 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 ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
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