- 您现在的位置：买卖IC网 > PDF目录66050 > PT6523G SWITCHING REGULATOR, SIP14 PDF资料下载
参数资料
| 型号： | PT6523G |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, SIP14 |
| 封装： | SIP-14 |
| 文件页数： | 5/5页 |
| 文件大小： | 500K |
| 代理商： | PT6523G |
For assistance or to order, call (800) 531-5782
5
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
Application
Notes
PT6520 Series
Using the Standby Function on the PT6520 3.3/5V
Bus Converters
The PT6520 series are high efficiency regulators that are de-
signed to operate off low input bus voltages. The regulators are
also pin-compatible with Power Trends’ PT6500/6600 series.
These devices feature a standby function, which may be used in
applications that require power-up/shutdown sequencing, and
wherever there is a requirement for the output status of the
module to be controlled by 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 when a valid supply voltage is ap-
plied to Vin (pins 4, 5, & 6) with respect to GND (pins 7-10). If
a low voltage3 is then applied to pin 3 the regulator output will
be disabled and the input current drawn by the ISR will typically
drop to 5mA4. The standby control may also be used to hold-off
the regulator output during the period that input power is ap-
plied.
Pin 3 is ideally controlled with an open-collector (or open-drain)
discrete transistor (See Figure 1). The open-ciruit voltage is
typcially 12.6V. Table 1 gives the circuit parameters for this
control input.
Table 1 Standby Control Circuit Parameters (2, 3)
Parameter
Min
Typ
Max
On/Off Threshold
0.2V
Istby
0.5mA
Vstby
12.6V
15V
Notes:
1. The operation of the Standby/Inhibit is similar for all Power
Trends’ modules, but the flexibility and threshold tolerances
will be different. For specific information on this function
for other regulator models, consult the applicable application
note.
2 The standby control input requires no external pull-up resis-
tor. The open-circuit voltage of the STBY* pin is typically
12.6V.
3. 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
0.2Vdc with a low-level 0.5mA sink to ground.
4. When the regulator output is disabled the current drawn
from the input source is typically reduced to 5mA.
Figure 1
Turn-On Time:
In the circuit of Figure 1, turning Q
1 on applies a
low voltage to the Standby control (pin 3) and disables the regu-
lator ouput. Correspondingly, turning Q
1 off removes the
low-voltage signal and enables the output. Once enabled, the
output will typically experience a 10–15ms delay followed by a
predictable ramp-up of voltage. The regulator should provide a
fully regulated output voltage within 40ms. The waveform of
Figure 2 shows the output voltage response of a PT6521 (3.3V)
following the turn-off of Q
1 at time t = 0.0 secs. The waveform
was measured with a 5Vdc input voltage, and 0.6
load.
Figure 2
0
5
10
15
20
25
30
35
t (milli - secs)
Vout (2V / Div)
C
in
+
C
out
+
Inhibit
V
in
V
o
COM
PT6520
11,12,13
14
7,8,9,10
4,5,6
Vin
Vo
G N D
Vo(adj)
STBY
3
Vo(sense)
1
Q1
BSS138
相关PDF资料 |
PDF描述 |
|---|---|
| PT6526E | SWITCHING REGULATOR, SIP14 |
| PT6521B | SWITCHING REGULATOR, SIP14 |
| PT6521R | SWITCHING REGULATOR, SIP14 |
| PT6521P | SWITCHING REGULATOR, SIP14 |
| PT6523D | SWITCHING REGULATOR, SIP14 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PT6523-HQ | 制造商:PTC 制造商全称:Princeton Technology Corp 功能描述:1/3 Duty General Purpose LCD Driver IC |
| PT6523L | 制造商:TI 制造商全称:Texas Instruments 功能描述:8-A 5-V/3.3-V Input Adjustable ISR with Short-Circuit protection |
| PT6523-LQ | 制造商:PTC 制造商全称:Princeton Technology Corp 功能描述:1/3 Duty General Purpose LCD Driver IC |
| PT6523LT | 功能描述:DC/DC转换器 2.5Vout 8A 5V/3.3V Inp Adj 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: |
| PT6523M | 制造商:TI 制造商全称:Texas Instruments 功能描述:8-A 5-V/3.3-V Input Adjustable ISR with Short-Circuit protection |
发布紧急采购，3分钟左右您将得到回复。