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参数资料
| 型号： | PT6984C |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 10.5 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, SMA23 |
| 封装： | SMD-23 |
| 文件页数： | 3/13页 |
| 文件大小： | 295K |
| 代理商： | PT6984C |
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com
PT6980 Series
Using the Standby Function on the PT6980
Series of Dual-Output Voltage Regulators
Both output voltages of the 23-pin PT6980 dual-output
converter may be disabled using the regulator’s ‘Standby’
function. This function may be used in applications that
require power-up/shutdown sequencing, or wherever there
is a requirement to control the output voltage On/Off status
with external circuitry.
The standby function is provided by the STBY* control
(pin 3). If pin 3 is left open-circuit the regulator operates
normally, and provides a regulated output at both Vo1 (pins
12–15) and Vo2 (pins 18–21) whenever a valid supply volt-
age is applied to Vin (pins 4, 5, & 6) with respect to GND
(pins 7-11). If a low voltage1 is then applied to pin-3 both
regulator outputs will be simultaneously disabled and the
input current drawn by the ISR will drop to a typical value
of 4mA. The standby control may also be used to hold-off
both regulator outputs during the period that input power is
applied.
The standby pin is ideally controlled using an open-collector
(or open-drain) discrete transistor (See Figure 1). The
open-circuit voltage is the input voltage +Vin. Table 1 gives
the circuit parameters for this control input.
Table 1 Standby Control Parameters 1, 2
Parameter
Min
TYP
Max
Enable (VIH)
—
Open circuit
Disable (VIL)
–0.1V
—
0.4V 1
VSTBY (open circuit)
—
+Vin 2
—
ISTBY (IIL)
—
–0.5mA
Notes:
1. The standby control input is
Not compatible with TTL or
other devices that incorporate a totem-pole output drive. Use
only a true open-collector device, preferably a discrete bipolar
transistor (or MOSFET). To ensure the regulator output is
disabled, the control pin must be pulled to less than 0.4Vdc
with a low-level 0.5mA sink to ground.
2 The standby control input requires no external pull-up resistor.
The open-circuit voltage of the STBY* pin is the input
voltage +Vin.
3. When the regulator output is disabled the current drawn from
the input source is typically reduced to 4mA.
Figure 1
Turn-On Time:
Turning Q1 in Figure 1 off removes the low-
voltage signal at pin 3 and enables the PT6980 series
regulator. Following a delay of about 25ms, Vo1 and Vo2
rise together until the lower voltage, Vo2, reaches its set
output. Vo1 continues to rise until both outputs reach full
regulation voltage. The total power-up time is less than
40ms, and is relatively independent of load, temperature,
and output capacitance. Figure 2 shows waveforms of the
output voltages, Vo1 and Vo2, for a PT6984 (3.3V/1.2V).
The turn-off of Q1 corresponds to the rise in VSTBY. The
waveforms were measured with a 12V input voltage, and
with resistive loads of 5A and 1.25A at the Vo1 and Vo2
outputs respectively.
Figure 2
C
1
+
C
2
+
Inhibit
V
in
Vo
2
COM
Q1
BSS138
Vo
1
C
3
+
4, 5, 6
PT6984
18–21
23
7–11
V
IN
Vo
2
GND
V
2 (adj)
V
1 (sns)
1
16
V
1 (adj)
12–15
Vo
1
V
2 (sns)
22
STBY
3
V1 (1V/Div)
V2 (1V/Div)
HORIZ SCALE: 5ms/Div
Vstby (10V/Div)
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相关代理商/技术参数 |
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| PT6984N | 功能描述:DC/DC转换器 3.3V/1.2V 8.6A 12V-In Dual Otpt ISR 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: |
| PT6985 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:2.5V/1.2V. 9A 12V-Input Dual Output ISR |
| PT6985A | 功能描述:REGULATOR 2.5/1.2V 12VIN HORZ RoHS:是 类别:电源 - 板载 >> DC DC Converters 系列:PT6980 设计资源:Maxi/Mini/Micro Design Guide, Appl Manual 标准包装:1 系列:Maxi 类型:隔离 输出数:1 电压 - 输入（最小）:43V 电压 - 输入（最大）:110V Voltage - Output 1:15V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:* 电源（瓦） - 制造商系列:400W 电压 - 隔离:* 特点:* 安装类型:通孔 封装/外壳:模块 尺寸/尺寸:4.60" L x 2.20" W x 0.54" H（116.8mm x 55.9mm x 13.7mm） 包装:散装 工作温度:-55°C ~ 100°C 效率:* 电源（瓦特）- 最大:* |
| PT6985C | 制造商:TI 制造商全称:Texas Instruments 功能描述:10-A 12V-Input Dual Output Integrated Switching Regulator |
| PT6985N | 制造商:TI 制造商全称:Texas Instruments 功能描述:10-A 12V-Input Dual Output Integrated Switching Regulator |
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