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參數(shù)資料
| 型號： | PT6702C |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 4/7頁 |
| 文件大?。?/td> | 152K |
| 代理商： | PT6702C |
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes
Operating Features of the Programmable
PT6700
“
Excalibur
”
Series ISRs
Power Good
Programmable versions of the PT6700 Series regulators
incorporate a
PWR Good
output (pin 2). This output is
open-drain and generates an acitve-high signal when the
sensed output from the ISR is within a nominal ±10% of
the programmed set point. When the regulated output is
outside this range, pin 2 asserts a logic low (typically <0.1V). A
10-k
pull-up resistor to a valid bus voltage is required.
If the power good feature is not used, the pull-up resistor
can be omitted. The maximum voltage that may be ap-
plied to the pull-up resistor is 15V.
Over-Voltage Protection (OVP)
The PT6700 programmable regulators also incorporate
an OVP function. The
OVP DRV
(pin 1) normally has a
logic low output (typically <0.1V). When the ISR’s sensed
output exceeds the programmed output setting by 15%,
pin 1 produces a 60mA, +12V drive signal. This drive
signal can trigger an SCR, which can be used to disable
the input voltage (via a fuse), or alternatively interface to
another external monitoring device. When the ISR output
voltage returns to within 15% of its programmed setting,
pin 1 reverts back to its low state. If the OVP function is
not used, pin 1 may be left open circuit.
Stand-By Function
The PT6700 series ISRs incorporate a standby function.
This feature may be used for power-up sequencing, or
wherever there is a requirement for the output voltage
to be controlled by external circuitry.
If the
STBY*
input (pin 8) is left open-circuit the regulator
operates normally, providing a regulated output when a
valid supply voltage is applied to V
in
(pins 10-12) with
respect to GND (pins 14-18). Connecting pin 8 to ground
1
places the regulator in standby mode
2
, and reduces the input
current to typically 20mA (30mA max). Applying a ground
signal to pin 8 prior to power-up, will disable the output
during the period that input power is applied. To ensure
that the regulator output is properly enabled, pin 8 must
be open circuit.
Table 1 Standby Control Requirements
2
Parameter
Enable
Open Cct.
1
Disable
-0.1V
I
stby
Min
Typ
Max
0.4V
10μA
1.0V
Figure 1
Figure 2
C
out
+
C
in
+
5V
COM
Inhibit
L
O
A
D
V
o
=2.5V
COM
Q1
BSS138
PT6700
7
6
5
4
3
23
19-22
13
8
14-18
2
10-12
Vo
Vin
GND
SNS(+)
SNS(-)
Pwr
Good
STBY
VID4 - VID0
1
OVP
R1
10k
OVP DRV
Pwr
Good
PT6701/6702/6703, & PT6721/6722
0
5
10
15
20
25
30
35
40
t (milli - secs)
I
in
(5A/Div)
V
out
(2V/Div)
V
PWGD
(10V/Div)
Notes:
1. The standby on a PT6700 series regulator must be controlled
with an open-drain low-leakage (<100nA) MOSFET (See
fig. 1). Table 1 gives the threshold requirements.
Do Not
use a
pull-up resistor. The control input has an open-circuit voltage of
between 4Vdc and 5Vdc. To set the regulator output to zero,
the control pin must be “pulled” to less than 1.0Vdc by sinking
current to ground.
2. When placed in the standby mode, the regulator output may
assert a low impedance to ground. If an external voltage is
applied to the output, it will sink current and possibly over-
stress the part.
Turn-On Time
Turning Q
1
in Figure 1 off, removes the low-voltage signal
at pin 8. After a 10-15ms delay the regulator output
rises and reaches full output voltage within 30ms. Fig. 2
shows the typical waveforms of a PT6701 following the
prompt turn-off of Q
1
at time t =0 secs. The output volt-
age was set to 2.5V, and the waveforms were measured
with a 5V input source, and 10A resistive load.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PT6702N | 功能描述:DC/DC轉(zhuǎn)換器 1.3-2.05Vout 3.3V-In 13A Prog ISR RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PT6703 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:13-A Low-Voltage Programmable Integrated Switching Regulator |
| PT6703A | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.1 to 1.85V 5/3.3V Input 13A Prog ISR RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| PT6703C | 功能描述:DC/DC轉(zhuǎn)換器 1.1 to 1.85V 5/3.3V Input 13A Prog ISR RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PT6703N | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.1 to 1.85V 5/3.3V Input 13A Prog ISR RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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