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参数资料
| 型号： | PTV03020WAH |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封装： | SIP-12 |
| 文件页数： | 15/19页 |
| 文件大小： | 434K |
| 代理商： | PTV03020WAH |
www.ti.com
DEVICE INFORMATION
PIN 1
PIN 5
PIN 12
SLTS243A – FEBRUARY 2005 – REVISED OCTOBER 2007
TERMINAL FUNCTIONS
TERMINAL
DESCRIPTION
NAME
NO.
VI
5, 6
The positive input voltage power node to the module, which is referenced to common GND.
VO
3, 4
The regulated positive power output with respect to the GND node.
This is the common ground connection for the VI and VO power connections. It is also the 0-Vdc reference for the
GND
1, 2, 10, 11
control inputs.
The Inhibit pin is an open-collector/drain, active-low input that is referenced to GND. Applying a low-level ground
signal to this input disables the module's output and turns off the output voltage. When the Inhibit control is active,
Inhibit
12
the input current drawn by the regulator is significantly reduced. If the inhibit feature is not used, the control pin
should be left open-circuit. The module then produces an output voltage whenever a valid input source is applied.
A 1% resistor must be connected directly between this pin and GND (pin 1 or 2) to set the output voltage of the
module higher than its lowest value. The temperature stability of the resistor should be 100 ppm/
°C (or better).
The set-point range is 0.8 V to 3.6 V. The resistor value can be calculated using a formula. If this input is left
Vo Adjust
8
open-circuit, the output voltage defaults to its lowest value. For further information, consult the related application
note.
The specification table gives the standard resistor values for a number of common output voltages.
The sense input allows the regulation circuit to compensate for voltage drop between the module and the load. For
Vo Sense
7
optimal voltage accuracy Vo Sense should be connected to VO. It can also be left disconnected.
This is an analog control input that enables the output voltage to follow an external voltage. This pin becomes
active typically 20 ms after the input voltage has been applied, and allows direct control of the output voltage from
0 V up to the nominal set-point voltage. Within this range, the output follows the voltage at the Track pin on a
volt-for-volt basis. When the control voltage is raised above this range, the module regulates at its set-point
Track
9
voltage. The feature allows the output voltage to rise simultaneously with other modules powered from the same
input bus. If unused, this input should be connected to VI.
NOTE: Due to the undervoltage lockout feature, the output of the module cannot follow its own input voltage
during power up. Consult the related Application Information for further guidance.
Front View of Module
Figure 5. Pin Terminal Locations
Copyright 2005–2007, Texas Instruments Incorporated
5
Product Folder Link(s) :PTV03020W
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