ST L200 User Manual
®
ADJUSTABLE V O LTAGE AND CU RR ENT REGU LATOR
ADJUSTABLE OUTPUT CURRENT UP TO 2 A
(GUARA NTEED UP TO T
ADJUSTABLE OUTPUT VOLTAGE DOWN TO
2.85 V
INPUT OVERVOLTAGE PROTECTION (UP TO
60 V, 10 ms)
SHORT CIRCUIT PROTECTION
OUTPUT TRANSISTOR S.O.A. PROTECTION
THERMA L OVERLOAD PRO T ECTION
LOW BIAS CURRENT ON REGULATION PIN
LOW STANDBY CURRENT DRAIN
DESCRIPTION
The L200 is a monolithic integrated circuit for voltage and current programmable regulation. It is
available in Pentawatt
metal case. Current limiting, power limiting, thermal
shutdown and input over voltage protection (up to
= 150 °C)
j
®
package or 4-lead TO-3
L200
Pentawatt
60 V) make the L200 virtually blow-out proof.
The L200 can be used to replace fixed voltage
regulators when high output voltage precision is
required and eliminates the need to stock a range
of fixed voltage regulators.
®
TO-3 (4 lead)
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter V alue Unit
DC Input Voltage 40 V
V
i
V
Peak Input Voltage (10 ms) 60 V
i
Dropout V oltage 32 V
V
∆
i-o
Output Current internally limited
I
o
P
Power Dissipation internally limited
tot
Storage Temperature -55 to 150
T
stg
Operating Junction Temperature for L200C -25 to 150
T
op
for L200 -55 to 150
THERMAL DATA
TO-3 Pentawatt
R
th j-case
R
th j-amb
January 2000
Thermal Resistance Junction-case Max
Thermal Resistance Junction-ambient Max
4 °C/W 3 °C/W
35 °C/W 50 °C/W
C
°
C
°
C
°
®
1/12
L200
CONNECTION DIAGRAMS AND ORDER CODES
Type Pentawatt
L200 L200 T
L200 C L200 CH
L200 CV
BLOCK DIA GRAM
(top views )
®
TO-3
L200 CT
APPLICATION CIRCUITS
Figure 1. Programmable Voltage Regulator
with Current Limiting
2/12
Figure 2. Programmable Current Regulator.
SCHEMATIC DIA G RAM
L200
= 25 °C, unless otherwise specified)
ELECTRICAL CHARACTERISTICS
(T
amb
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VOLTAGE REGULATION LOOP
I
Quiescent drain Current (pin 3) Vi = 20 V 4.2 9.2 mA
d
e
Output Noise Voltage Vo = Vref Io = 10 mA
N
V
Output V ol tage Range Io = 10 mA 2.85 36 V
o
V
∆
o
V oltage Load Regulation
(note 1)
V
o
V
∆
i
Line Regulation V0 = 5 V
V
∆
o
SVR Supply V ol tage Rejectio n
Droupout V oltage between Pins 1
V
∆
i-o
and 5
V
Reference Voltage (pin 4) Vi = 20 V Io = 10 mA 2.64 2.77 2.86 V
ref
B = 1 MHz 80
Io = 2 A
∆
= 1.5 A
I
∆
o
V
= 8 to 18 V 48 60 dB
i
V
= 5 V Io = 500 mA
0
= 10 V
V
∆
i
f = 100 Hz (note 2)
pp
I
= 1.5 A
o
∆
V0 ≤ 2%
48 60 dB
0.15
0.1
2 2.5 V
1
0.9
µ
V
%
%
3/12
L200
ELECTRICAL CHARACTERISTICS
(continued)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
= 20 V Io = 10mA
V
∆
I
4
I
∆
T
∆
Z
o
Aver age Temper ature Coeffici ent
ref
of Reference Voltage
Bias Current and Pin 4 3 10
Aver age Temperature
4
Coefficient (pin 4)
•
I
4
Output Impedance Vi = 10 V Vo = V
V
i
for Tj = - 25 to 125 °C
for Tj = 125 to 150 °C
Io = 0.5 A f = 100 Hz
ref
-0.25
-1.5
-0.5
1.5
CURRENT REGULATION LOOP
V
SC
V
∆
T
∆
•
I
∆
I
o
Current Limit Sense V olta ge
between Pins 5 and 2
SC
Aver age Temper ature
Coefficient of V
V
SC
o
Current Load Regulation
SC
Vi = 10 V Vo = V
ref
I5 = 100 mA 0.38 0.45 0.52 V
0.03
Vi = 10 V ∆Vo = 3V
= 0.5 A
I
o
I
= 1A
o
I
= 1.5 A
o
1.4
1
0.9
mV/°C
mV/°C
A
µ
C
%/°
m
Ω
C
%/°
%
%
%
I
SC
Note 1: A load step of 2 A can be applied provited that input-output differential voltage is lower than 20 V (see Figure 3).
Note 2: The same performance can be maintained at higher output levels if a bypassing capacitor is provited between pins 2 and 4.
Figure 3. Typical Safe Operating Area
Protection.
Peak Short Circuit Current Vi - V0 = 14 V
(pins 2 and 5 short circuited)
3.6 A
Figure 4. Quiescent Current vs. Supply
Vo ltage.
4/12
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