LM350 Datasheet, PDF (4/12 Pages) Motorola, Inc – THREE.TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR

Vin
Vin
Cin 0.1µF
LM350
Figure 2. Load Regulation and ∆IAdj/Load Test Circuit
Load Regulation (% VO) =
VO (min Load) – VO (max Load)
VO (min Load)
X 100
Load Regulation (mV) = VO _{(min Load)} –VO _{(max Load)}
Vout
LM350
IL
VO (min Load)
VO _{(max Load)}
Adjust
IAdj
R1
240
1%
+
CO 1.0µF
RL
(max Load)
*
RL
(min Load)
R2
1%
* Pulse Testing Required:
1% Duty Cycle is suggested.
Vin
VI
Cin 0.1µF
Pulse Testing Required:
1% Duty Cycle is suggested.
Figure 3. Standard Test Circuit
Vout
LM350
IL
Adjust
IAdj
ISET
R2
1%
R1
240
1%
Vref
RL
+
CO 1.0µF
VO
To Calculate R2:
Vout = ISET R2 + 1.250 V
Assume ISET = 5.25 mA
24V
14V
f = 120 Hz
Figure 4. Ripple Rejection Test Circuit
Vin
Vout
LM350
IL
Vout = 10 V
Cin 0.1µF
Adjust
R1
240
1%
D1 *
1N4002
RL
+
CO 1.0µF
VO
R2
1.65K
1%
**
+
CAdj 10µF
* D1 Discharges CAdj if Output is Shorted to Ground.
**CAdj provides an AC ground to the adjust pin.
4
MOTOROLA ANALOG IC DEVICE DATA