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參數(shù)資料
| 型號： | LM2703 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Micropower Step-up DC/DC Converter with 350mA Peak Current Limit |
| 中文描述： | 微功耗升壓型DC / DC 350mA的峰值電流限制轉(zhuǎn)換器 |
| 文件頁數(shù)： | 3/11頁 |
| 文件大?。?/td> | 307K |
| 代理商： | LM2703 |
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
(Note 1)
V
IN
SW Voltage
FB Voltage
SHDN Voltage
Maximum Junction Temp. T
J
(Note 2)
Lead Temperature
(Soldering 10 sec.)
Vapor Phase
(60 sec.)
7.5V
21V
2V
7.5V
150C
300C
215C
Infrared
(15 sec.)
ESD Ratings (Note 3)
Human Body Model
Machine Model (Note 4)
220C
2kV
200V
Operating Conditions
Junction Temperature
(Note 5)
Supply Voltage
SW Voltage Max.
40C to +125C
2.2V to 7V
20.5V
Electrical Characteristics
Specifications in standard type face are for T
J
= 25C and those in
boldface type
apply over the full
Operating Temperature
Range
(T
J
= 40C to +125C). Unless otherwise specified. V
IN
=2.2V.
Symbol
Parameter
Conditions
Min
(Note 5)
Typ
(Note 6)
40
235
0.01
1.237
350
Max
(Note 5)
70
300
2.5
1.269
400
400
120
7.0
1.6
Units
I
Q
Device Disabled
Device Enabled
Shutdown
FeedbackTrip Point
Switch Current Limit
FB = 1.3V
FB = 1.2V
SHDN = 0V
μA
V
FB
I
CL
1.189
275
260
V
mA
I
B
V
IN
R
DSON
T
OFF
I
SD
FB Pin Bias Current
Input Voltage Range
Switch R
DSON
Switch Off Time
SHDN Pin Current
FB = 1.23V (Note 7)
30
nA
V
ns
2.2
0.7
400
0
15
0
0.05
1.8
8
SHDN = V
IN
, T
J
= 25C
SHDN = V
IN
, T
J
= 125C
SHDN = GND
V
SW
= 20V
ON/OFF Threshold
80
nA
I
L
UVP
V
FB
Hysteresis
SHDN
Threshold
θ
JA
Switch Leakage Current
Input Undervoltage Lockout
Feedback Hysteresis
5
μA
V
mV
SHDN low
SHDN High
Thermal Resistance
0.7
0.7
220
0.3
V
1.1
C/W
Note 1:
Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended to
be functional, but device parameter specifications may not be guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2:
The maximum allowable power dissipation is a function of the maximum junction temperature, T
J
(MAX), the junction-to-ambient thermal resistance,
θ
JA
,
and the ambient temperature, T
A
. See the Electrical Characteristics table for the thermal resistance. The maximum allowable power dissipation at any ambient
temperature is calculated using: P
D
(MAX) = (T
J(MAX)
T
A
)/
θ
JA
. Exceeding the maximum allowable power dissipation will cause excessive die temperature.
Note 3:
The human body model is a 100 pF capacitor discharged through a 1.5 k
resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin.
Note 4:
ESD susceptibility using the machine model is 150V for SW pin.
Note 5:
All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are 100%
production tested or guaranteed through statistical analysis. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality
Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
Note 6:
Typical numbers are at 25C and represent the most likely norm.
Note 7:
Feedback current flows into the pin.
L
www.national.com
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| LM2703EV | 功能描述:電源管理IC開發(fā)工具 LM2703 EVAL UNIT RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM2703EV/NOPB | 制造商:Texas Instruments 功能描述:Evaluation Board For LM2703 |
| LM2703MFADJ | 制造商:Texas Instruments 功能描述: |
| LM2703MF-ADJ | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM2703MF-ADJ | 制造商:Texas Instruments 功能描述:IC PFM DC/DC CONV ADJ POWERWISE |
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