CLM2815 Datasheet, PDF (4/6 Pages) Calogic, LLC – 1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output Fast Response

CLM2815
FIGURE 2. BASIC ADJUSTABLE REGULATOR
V_OUT
CLM2815
I _ADJ
50mA
V_OUT = V_REF (1 + R₁/R₂) + I_ADJ R₂
V_REF
V_OUT
R1
R2
1U-23
CORPORATION
FIGURE 3. BASIC ADJUSTABLE REGULATOR
V_OUT
CLM2815
R_P PARASITIC LINE
RESISTANCE
CONNECT R ₁
TO CASE OF
REGULATOR
R1
RL
R₂
CONNECT
R2 TO
LOAD
1U-24
Output Voltage
Consider Figure 2. The resistance R1 generates a constant
current flow, normally the specified load current of 10mA.
This current will go through the resistance R2 to set the overall
output voltage. The current IADJ is very small and constant.
Therefore its contribution to the overall output voltage is very
small and can generally be ignored.
Load Regulation
Parasitic line resistance can degrade load regulation. In order
not to affect the behavior of the regulator, it is best to connect
directly the R1 resistance from the resistor divider to the case,
and not to the load. For the same reason, it is best to connect
the resistor R2 to the Negative side of the load.
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