The document summarizes the modeling of a voltage regulator component. It provides the part number, manufacturer, model parameters, and simulation results comparing the input-output voltage differential, ripple rejection, and output characteristics to measurements. The simulation matches the measurements well with less than 5% error.

1. Device Modeling Report
COMPONENTS: VOLTAGE REGULATOR
PART NUMBER: LM7815
MANUFACTURER: FAIRCHILD SEMICONDUCTOR
Panasonic
Bee Technologies Inc.
All Rights Reserved Copyright (c) Bee Technologies Inc. 2010
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2. MODEL PARAMETER
Pspice
model Model description
parameter
VREF Reference Voltage
N Emission Coefficient
BETA Tranconductance of JFET Transistor
VAF Early Voltage of Output Pass Transistor
CPZ Output Impedance Zero Capacitor
RB2 Base Resistance of Output Limit Voltage Source
ESC1 Coefficient of Current Limit Voltage Source
ESC2 Coefficient of Current Limit Voltage Source
EFB1 Coefficient of Foldback Current Voltage Source
EFB2 Coefficient of Foldback Current Voltage Source
EFB3 Coefficient of Foldback Current Voltage Source
EB Non-ideal Base-Collector Diode Saturation Current
All Rights Reserved Copyright (c) Bee Technologies Inc. 2010
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3. Input-Output Voltage Differential Characteristic
Simulation Result
18V
(17.081,14.900)
15V
12V
9V
6V
3V
0V
0V 5V 10V 15V 20V 25V 30V 35V
V(Output)
V_V1
Evaluation Circuit
U1
LM7815
Input Output
IN OUT
GND
VIN
IO
CI CO
0.33u 0.1u
1A
0
Comparison Table
Condition: IO = 1A, VI = 23V, CI = 0.33μF, CO = 0.1μF,
Parameter Measurement Simulation %Error
VDROP(V) 2.000 2.081 4.05
All Rights Reserved Copyright (c) Bee Technologies Inc. 2010
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4. Ripple Rejection (RR) Characteristic
Simulation Result
40V
20V
0V
V(INPUT)
15.020V
(10.230m,15.016)
15.015V
(6.0733m,15.012)
SEL>>
15.010V
0s 4ms 8ms 12ms 16ms 20ms 24ms 28ms 32ms 36ms 40ms
V(Output)
Time
Evaluation Circuit
U1
LM7815
Input Output
IN OUT
VIRR GND
VOFF = 0 IO
VAMPL = 5
FREQ = 120 CI CO
0.33u 0.1u 0.5A
VI
23.5Vdc
0
Comparison Table
Condition: IO = 500mA, VI = 23V, CI = 0.33μF, CO = 0.1μF, f = 120Hz, VI = 18.5V to 28.5V
Parameter Measurement Simulation %Error
RR(dB) 70.000 68.712 -1.84
All Rights Reserved Copyright (c) Bee Technologies Inc. 2010
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5. Output Characteristic
Simulation Result
20V
(500.000m,15.014) (2.2045,15.027)
10V
0V
0A 0.4A 0.8A 1.2A 1.6A 2.0A 2.4A
V(Output)
I(RL)
Evaluation Circuit
E1
U1 EVALUE
LM7815 V(1,0)*(V(%IN+, %IN-)-1)
Input Output V(2,0)+V(3,0)
IN OUT OUT+ IN+
OUT- IN-
GND
VI 1 OUT
CI
CO RL
23Vdc 0.33u 0.1u 10 R4
100MEG
2 3
0
V1 = 10 V3 V1 = 0 V4 R6
V2 = 0.05 R5 V2 = 100 100MEG
TD = 50m 100MEG TD = 0
TR = 500m TR = 50n
TF = 50n TF = 50n
PW = 50n PW = 50m
PER = 600m PER = 600m
0
Comparison Table
Condition: IO = 250mA to 750mA, VI = 23V, CI = 0.33μF, CO = 0.1μF,
Parameter Measurement Simulation %Error
VO(V) 15.000 15.014 0.09
IPK(A) 2.200 2.205 0.20
All Rights Reserved Copyright (c) Bee Technologies Inc. 2010
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