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參數(shù)資料
| 型號(hào)： | PTN78000WAH |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3.2 A SWITCHING REGULATOR, 660 kHz SWITCHING FREQ-MAX, DMA5 |
| 文件頁數(shù)： | 20/26頁 |
| 文件大?。?/td> | 634K |
| 代理商： | PTN78000WAH |
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ELECTRICAL CHARACTERISTICS
www.ti.com...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008
operating at 25°C free-air temperature, VI = 20 V, VO = 5 V, IO = IO (max), CI = 2.2 F, CO = 100 F (unless otherwise noted)
PTN78000W
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
IO
Output current
TA = 85°C, natural convection airflow
0
1.5
A
VI
Input voltage range
Over IO range
7 (1)
36 (2)
V
Set-point voltage tolerance
TA = 25°C
±2% (3)
Temperature variation
–40°C to +85°C
±0.5%
Line regulation
Over VI range
±10
mV
VO
Load regulation
Over IO range
±10
mV
Includes set point, line, load
Total output voltage variation
±3% (3)
–40°C < TA < 85°C
VI < 12 V
2.5
VI – 2
12 V
≤ VI ≤ 15.1 V
2.5
VI – 2.5
VO Adj
Output voltage adjust range
V
15.1 V < VI ≤ 25 V
2.5
12.6
VI > 25 V
0.1 x VI
12.6
VI = 24 V, RSET = 732 , VO = 12 V
91%
η
Efficiency
VI = 15 V, RSET = 21 k, VO = 5 V
86%
VI = 15 V, RSET = 78.7 k, VO = 3.3 V
82%
Output voltage ripple
20 MHz bandwith
1% VO
V(PP)
IO (LIM)
Current limit threshold
ΔVO = –50 mV
3.2
A
1 A/s load step from 50% to 100% IOmax
Transient response
Recovery time
100
s
VO over/undershoot
2.5
%VO
VI increasing
5.5
UVLO
Undervoltage lockout
V
VI decreasing
5.2
Input high voltage (VIH)
1
Open (4)
V
Inhibit control (pin 3)
Input low voltage (VIL)
–0.1
0.3
Input low current (IIL)
0.25
mA
II (STBY)
Input standby current
Pin 3 connected to GND
17
mA
FS
Switching frequency
Over VI and IO ranges
440
550
660
kHz
CI
External input capacitance
Ceramic
2.2 (5)
F
Nonceramic
100 (6)
F
CO
External output capacitance
Ceramic
200
Equiv. series resistance (nonceramic)
10 (7)
m
Per Telcordia SR-332, 50% stress,
MTBF
Calculated reliability
8.9
106 Hr
TA = 40°C, ground benign
(1)
For output voltages less than 10 V, the minimum input voltage is 7 V or (VO + 2) V, whichever is greater. For output voltages of 10 V
and higher, the minimum input voltage is (VO + 2.5) V. See the Application Information section for further guidance.
(2)
For output voltages less than 3.6 V, the maximum input voltage is 10 × VO . See the Application Information section for further guidance.
(3)
The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a
tolerance of 1% with with 100 ppm/°C or better temperature stability.
(4)
This control pin has an internal pullup, and if left open circuit, the module operates when input power is applied. The open-circuit voltage
is typically 1.5 V. A smal,l low-leakage (< 100 nA) MOSFET is recommended for control. See the Application Information section for
further guidance.
(5)
An external 2.2-F ceramic capacitor is required across the input (VI and GND) for proper operation. Locate the capacitor close to the
module.
(6)
100 F of output capacitance is required for proper operation. See the Application Information section for further guidance.
(7)
This is the typical ESR for all the electrolytic (nonceramic) capacitance. Use 17 m
as the minimum when using maximum ESR values
to calculate.
Copyright 2004–2008, Texas Instruments Incorporated
3
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| PTN78000WAS | 功能描述:DC/DC轉(zhuǎn)換器 ADJ SWITCHING REGULATOR 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: |
| PTN78000WAST | 功能描述:DC/DC轉(zhuǎn)換器 ADJ SWITCHING REGULATOR 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: |
| PTN78000WAZ | 功能描述:DC/DC轉(zhuǎn)換器 ADJ SWITCHING REGULATOR 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: |
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