参数资料
型号: L99PM62XP
厂商: STMICROELECTRONICS
元件分类: 电源管理
英文描述: 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO36
封装: ROHS COMPLIANT, POWERSSO-36
文件页数: 5/98页
文件大小: 1117K
代理商: L99PM62XP
L99PM62XP
Description
Doc ID 16363 Rev 2
maximum continuous load current is 100 mA. The regulator provides accuracy better than
+ 3% at 50 mA (4 % at 100 mA and is protected against.
Overload
Overtemperature
Short circuit (short to ground and battery supply voltage)
Reverse biasing
2.1.3
Increased output current capability for voltage regulator V2
For applications which require high output currents, the output current capability of the
regulator can be increased my means of the integrated operational amplifiers and an
external pass transistor.
Figure 3.
Voltage source with external PNP
Figure 4.
Voltage source with external PNP and current limitation
Figure 3 shows a possible configuration with a PNP pass element using voltage regulator 2
to provide the voltage reference for the regulated output voltage V3.
The Vs operating range for this circuit is 5.5 V to 18 V. It is important the respect the input
common mode range specified for the operational amplifiers.
The output voltage V3 can be calculated using the following formula:
V2
Ci
+
-
C3
Cem
C1
Vs
V3
C2
L99PM62
R3
R5
Rb
R4
R1
R2
MJD32C
OPx_OUT
OPx -
OPx +
V2
Ci
+
-
C3
Cem
C1
Vs
V4
C2
L99PM62
R3
R5
Rb
R4
R1
R2
MJD32C
R6
BC857
OPx_OUT
OPx -
OPx +
v
3
v
2
------
R
1
R
2
+
R
2
--------------------- V
[]
=
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