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参数资料
| 型号： | TK740SIL-2626 |
| 厂商： | TOKO INC |
| 元件分类： | 固定正电压多路输出LDO稳压器 |
| 英文描述： | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO8 |
| 封装： | SOT-23, 8 PIN |
| 文件页数： | 19/29页 |
| 文件大小： | 584K |
| 代理商： | TK740SIL-2626 |
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Page 26
January 22, 2002 TOKO, Inc.
TK740xxL
APPLICATION INFORMATION (CONT.)
Super-Low I/O Voltage Difference and High Current LDO
Connect the following terminals; pin 5 and pin 8, pin 1 and pin 4, pin 2 and pin 3. V
DROP = 70 mV at 100 mA; 125 mV at 200 mA;
180 mV at 300 mA is typically obtained.
Attention when this application is adopted
The control current and the no load current double because the A and B circuits are connected in parallel. A very large current
flows at the output during a short-circuit. Therefore, there is a possibility of damage by the current. Please note the short-
circuit of the output side and GND. The current value that can regularly be delivered is 300-400 mA. The output current is
limited by the permissible electric power loss of the package. The current cannot be delivered exceeding this. However,
a large peak current can be delivered for the pulse load with little generation of heat. The permissible loss increases by
improving heat radiation. Please make the copper pattern in the IC part installation as wide as possible.
For instance, the permissible electric power loss increases greatly if the board thermal plan is bonded to the IC. The
characteristic of this application is not guaranteed immediately because Toko does not test to this application. The
characteristic of this application is almost obtained by guaranteeing the characteristic on the A side and the B side. The
difference appears large; use care when designing.
VOUT
8
GND
VIN
VCONT
CL 1
0.22
F
FBA
FBB
6
-100
DROPOUT VOLTAGE A + B
-50
0
-150
-200
-250
0
100
200
V
DROP
(m
V)
IOUT(mA)
A
B
A+ B
6
8
10
4
2
0
100
200
IOUT(mA)
IGND vs. IOUT A + B
I GND
(m
A
)
LOAD REGULATION
0
100
200
300
400
IOUT(mA)
VOUT
(10 mV/DIV
3
SHORT CIRCUIT CURRENT
4
5
2
1
0
500
1000
IOUT(mA)
VOUT(TYP)
V
OUT
(V)
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