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参数资料
| 型号： | PT5406N |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 5.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, MSMA5 |
| 封装： | METAL, VERTICAL MOUNT PACKAGE-5 |
| 文件页数： | 15/16页 |
| 文件大小： | 304K |
| 代理商： | PT5406N |
Application Notes
For technical support and further information, visit http://power.ti.com
Using the Inhibit Control of the PT5400
SWIFT
Series of Power Modules
For applications requiring output voltage On/Off control,
the PT5400 series of SWIFT power modules incorporate
an inhibit function. This function can be used wherever
there is a requirement for the module to be switched
off. The On/Off function is provided by the Inhibit
(pin 1) control.
The ISR functions normally with Pin 1 open-circuit,
providing a regulated output whenever a valid source
voltage is applied to Vin, (pin 2). When a low-level2
ground signal is applied to pin 1, the regulator output
will be disabled.
Figure 3-1 shows an application schematic, which details
the typical use of the Inhibit function. Note the discrete
transistor (Q1). The Inhibit control has its own internal
pull-up to +Vin potential. An open-collector or open-drain
device is required to control this input 1. The Inhibit pin
control thresholds are given in Table 3-1.
Table 3-1; Inhibit Control Requirements
Parameter
Min
Max
Enable (VIH)Vin – 0.5
Open
Disable (VIL)
–0.2V
+0.5V
Notes:
1. Use an open-collector device (preferably a discrete
transistor) for the Inhibit input. A pull-up resistor is not
necessary. To disable the output voltage, the control pin
should be pulled low to less than +0.5VDC.
Figure 3-1
Turn-On Time:
In the circuit of Figure 3-1, turning Q1
on applies a low-voltage to the Inhibit control (pin 1)
and disables the regulator output. Correspondingly,
turning Q1 off allows the ISR to execute a soft-start
power up. The soft-start power up consists of a short
delay, td, followed by a period, t(SS), in which the output
voltage rises from zero to its full regulation voltage.
(See the section on Soft-Start Power Up). The module
produces a fully regulated output voltage within 25msec.
Figure 3-2 shows the typical rise in both output voltage
and input current for a PT5404 (1.8V), following the
turn-off of Q1. The turn off of Q1 corresponds to the
drop in the Q1 Vgs waveform. The time periods, td and
t(SS), are indicated. The waveforms were measured with
a 5Vdc input voltage, and 0.7-
resistive load.
Figure 3-2
C
1
100
F
+V
O
COM
+V
IN
COM
Inhibit
Q1
BSS138
PT5401
2
13
4
Vi n
Vo
GND
INH
t (SS)
d
t
Vout (1V/Div)
Iin (0.5A/Div)
HORIZ SCALE: 5ms/Div
Q1 Vgs (10V/Div)
PT5400 Series
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PT5407 | 制造商:TI 制造商全称:Texas Instruments 功能描述:6-A 5-V/3.3-V Input Adjustable SWIFT Power Module |
| PT5407A | 功能描述:DC/DC转换器 1V 6A 3.3/5V Input Adj SWIFT Module RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PT5407C | 功能描述:DC/DC转换器 1V 6A 3.3/5V Input Adj SWIFT Module RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PT5407N | 功能描述:开关变换器、稳压器与控制器 1V 6A 3.3/5V Input Adj SWIFT Module RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| PT5408 | 制造商:TI 制造商全称:Texas Instruments 功能描述:6-A 5-V/3.3-V Input Adjustable SWIFT Power Module |
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