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データシート 7805A PDF ダウンロード ( 特性, スペック, ピン接続図 )

部品番号 7805A
部品説明 3-Terminal positive Voltage Regulators
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7805A Datasheet, 7805A PDF,ピン配置, 機能
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7805A
3- Terminal Positive Voltage Regulators
Description
The 7805A can provide local on-card regulation, eliminating the
distribution problems associated with single point regulation. Each employs
internal current limiting, thermal shut-down and safe operating area protection,
making it essen-tially indestructible. If adequate heat sinking is provided, they can
deliver over 1A output current. Although designed primarily as fixed voltage
regulators, these devices can be used with external components to obtain
adjustable voltages and currents.
Features
Output Current In Excess of 1A
Output Voltage of 5V
Internal Short-Circuit Current Limiting & Thermal Overload Protection
Guaranteed In Extended Temperature Range
Absolute Maximum Ratings (TA=25°C)
7805AJ Pin Assignment
Tab
123
3-Lead Plastic TO-252
Package Code: J
Pin 1: VIN
Pin 2 & Tab: GND
Pin 3: VOUT
7805AE Pin Assignment
Tab
3-Lead Plastic TO-220AB
Package Code: E
Pin 1: VIN
Pin 2 & Tab: GND
Pin 3: VOUT
123
Characteristic
Symbol
Rating
Input Voltage
Power Dissipation
VIN 40
PD Internally limited (Note)
Operating Temperature
Topr
-30 to 85
Storage Temperature
Tstg
-55 to 150
Junction Temperature
Tj
150
Note: (1)TA=25oC, , TO-252: 1W, TO-220AB: 2.7W
(2)TC=25oC, All package: 10W
Thermal Data
Characteristic
Thermal Resistance Junction-Case
Thermal Resistance Junction-Ambient
Symbol
Rth(j-c)
Rth(j-a)
TO-252
12.5
125
Schematic Diagram & Equivalent Circuit
Unit
V
oC
oC
oC
TO-220AB
12.5
47
Unit
oC/W
oC/W
Schematic Diagram
Input
1
Current
Generator
Series
Pass
Element
Output
3
SOA
Protection
Equivalent Circuit
Starting
Circuit
Reference
Voltage
Error
Amplifier
Thermal
Protection
GND
2
VIN
VOUT
1
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7805A
Test Circuits
3- Terminal Positive Voltage Regulators
VIN 1
CIN
0.33uF
7805A
2
3 VOUT
VIN 1
COUT
0.1uF
CIN
0.33uF
7805A
3
2 RL
VOUT
270pF
100
DC Parameter
Load Regulation
VIN
1
-+
VOUT
0V
+- DC 9V
7805A
2
3 VOUT
RL
Ripple Rejection
Application Circuits
Constant Current Regulator
Circuit for Increasing Output Voltage
VIN 1
7805A
3
0.33uF
2 R1
IR1
0.1uF
VOUT
10uF
VIN 1
0.33uF
7805A
3
IB 2
R1
R2 0.1uF
VOUT
10uF
VOUT=VOUT(IC)+VZ
I1=VOUT(IC)/R1
High Output Current with Short-circuit Protection
VIN Rsc
R1 Q2
Q1
1
0.33uF
7805A
2
3 VOUT
0.1uF 10uF
VOUT=VOUT(IC)(1+R2/R1)+R2*IB
R1VBE1/IB(max)
RSC=VBE2/ISC, ISC: Short-Circuit Current
3
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7805A 電子部品, 半導体
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7805A
3- Terminal Positive Voltage Regulators
Soldering Methods for Orister’s Products
1. Storage environment: Temperature=10oC~35oC Humidity=65%±15%
2. Reflow soldering of surface-mount devices
Figure 1: Temperature profile
TP
Ramp-up
tP
Critical Zone
TL to TP
TL
Tsmax
tL
Tsmin
tS
Preheat
Ramp-down
25
t 25oC to Peak
Time
Profile Feature
Average ramp-up rate (TL to TP)
Preheat
- Temperature Min (Tsmin)
- Temperature Max (Tsmax)
- Time (min to max) (ts)
Tsmax to TL
- Ramp-up Rate
Time maintained above:
- Temperature (TL)
- Time (tL)
Peak Temperature (TP)
Time within 5oC of actual Peak
Temperature (tP)
Ramp-down Rate
Time 25oC to Peak Temperature
3. Flow (wave) soldering (solder dipping)
Products
Pb devices.
Pb-Free devices.
Sn-Pb Eutectic Assembly
<3oC/sec
100oC
150oC
60~120 sec
<3oC/sec
183oC
60~150 sec
240oC +0/-5oC
10~30 sec
<6oC/sec
<6 minutes
Peak temperature
245oC ±5oC
260oC +0/-5oC
Pb-Free Assembly
<3oC/sec
150oC
200oC
60~180 sec
<3oC/sec
217oC
60~150 sec
260oC +0/-5oC
20~40 sec
<6oC/sec
<8 minutes
Dipping time
5sec ±1sec
5sec ±1sec
6
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