Adjustable Positive Linear Regulator OM7602ST
Thru-Hole (TO-257AA) OM7602NT
www.irf.com 1
10/20/06
TO-257AA
Description
Features:
nAdjustable Output Voltage
nEliminates Stocking Fixed Voltages
n Built-In Thermal Oveload Protection
nShort Circuit Current Limiting
nIsolated / Non-Isolated Hermetic TO-257AA
Package ensures High Reliability
This three terminal positive regulator is supplied in
a hermetically sealed metal package. All protective
features are designed into the circuit, including
thermal shutdown, current-limiting, and safe-area
control. With heat sinking, these devices can deliver
up to 1.5 amps of output current. This unit also
features output voltages that can be trimmed from
1.2 volt to 37 volts using external resistors.
1.5A
P
ro
d
uc
t S
ummary
Part Number Input Voltage Range Adjustable Output Voltage Package
OM7602ST 4.25V to 41.25V 1.2V to 37V TO-257 (Isolated)
OM7602NT 4.25V to 41.25V 1.2V to 37V TO-257 (Non-Isolated)
Ab
so
l
u
t
e
M
ax
i
mum
R
a
ti
n
g
s
@ T
c
=
25°C
Parameter S
y
mbol Value Units
Input-Output Voltage Differential VI-O 40
Input Voltage Range VIN 4.25 to 41.25 V
Output Voltage Range VOUT 1.2 to 37
Output Current IOUT 1.5 A
Power Dissipation @ TC = 86°C PDC 17.5
Power Dissipation @ TA = 25°C PDA 3.0
Thermal Resistance, Junction to Case RθJC 3.5
Thermal Resistance, Junction to Ambient RθJA 42
Operating Junction Temperature Range TJ -55 to +150
Storage Temperature Range TSTG -65 to +150
Lead Temperature Solderin
g
(10 seconds maximum)
T
L300
°C
°C/W
W
PD-97259
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OM7602ST, OM7602NT
Notes
Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty
cycle is used. Changes in output voltage due to heating effects must be taken into account separately.
If not tested, shall be guaranteed to specific limits.
The specifications are applied over the full operating temperature range.
Electrical Characteristics -55°C
d
TA
d
125°C, IL = 8.0mA (Unless Otherwise Specified)
Parameter Symbol Test Conditions Min. Max. Units
VDIFF = 3.0V, TA = 25°C 1.2 1.3
Reference Voltage VREF VDIFF = 3.3V
e
1.2 1.3 V
VDIFF = 40V
e
1.2 1.3
3.0V ≤ VDIFF ≤ 40V, VOUT = VREF, TA = 25°C -9.0 9.0
3.3V ≤ VDIFF ≤ 40V, VOUT = VREF
e
-23 23
VDIFF = 3.0V, 10mA ≤ IL ≤ 1.5A, TA = 25°C -15 15
VDIFF = 3.3V, 10mA ≤ IL ≤ 1.5A
e
-15 15
VDIFF = 40V, 10mA ≤ IL ≤ 300mA, TA = 25°C -15 15
VDIFF = 40V, 10mA ≤ IL ≤ 195mA
e
-15 15
Thermal Regulation VRTH VIN = 14.6V, IL =1.5A, PD = 20W, t = 20ms, TA = 25°C -16 16
Ripple Rejection
d
RNf = 120Hz, VOUT = VREF, CADJ = 10µF
e
66 - dB
VDIFF = 3.0V, TA = 25°C -100
Adjustment Pin Current IADJ VDIFF = 3.3V
e
-100
VDIFF = 40V
e
-100
VDIFF = 3.0V, 10mA ≤ IL ≤ 1.5A, TA = 25°C -5.0 5.0
VDIFF = 3.3V, 10mA ≤ IL ≤ 1.5A
e
-5.0 5.0 µA
Adjustment Pin ∆IADJ VDIFF = 40V, 10mA ≤ IL ≤ 300mA, TA = 25°C -5.0 5.0
Current Change VDIFF = 40V, 10mA ≤ IL ≤ 195mA
e
-5.0 5.0
3.0V ≤ VDIFF ≤ 40V, TA = 25°C -5.0 5.0
3.3V ≤ VDIFF ≤ 40V
e
-5.0 5.0
VDIFF = 3.0V, VOUT =1.4V (forced), TA = 25°C -5.0
Minimum Load Current ILMIN VDIFF = 3.3V, VOUT =1.4V (forced)
e
-5.0
mA
VDIFF = 40V, VOUT =1.4V (forced)
e
-5.0
ICL VDIFF = 15V
e
1.5 3.5
VDIFF = 40V, TA = 25°C 0.18 1.5
Current Limit
d
A
Line Regulation
c
RLINE
RLOAD
mV
Load Regulation
c
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OM7602ST, OM7602NT
Fig. 1 Load Regulation
Fig. 4 Dropout Voltage
Fig. 3 Adjustment Pin Current
Fig. 6 Minimum Operating Current
Fig. 5 Temperature Stability
1.260
1.250
1.240
1.230
1.220
-75 -50 -25 0 25
T
J
, JUNCTION TEMPERATURE ( °C)
V
ref
, REFERENCE VOLTAGE (V)
50 75 100 125 150
3.0
2.5
2.0
1.5
1.0
-75 -50 -25 0 25
T
J
, JUNCTION TEMPERATURE ( °C)
V
I
- V
O,
INPUT-OUTPUT VOLTAGE
DIFFERENTIAL (V
dc
)
50 75 100 125 150
I
L
= 1.5A
I
L
= 1.0A
I
L
= 200mA
I
L
= 20mA
I
L
= 500mA
V
O
= 100mV
70
65
60
55
50
45
40
35
-75 -50 -25 0 25
T
J
, JUNCTION TEMPERATURE ( °C)
I
Adj
, ADJUSTMENT PIN CURRENT (µA)
50 75 100 125 150
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-75 -50 -25 0 25
T
J
, JUNCTION TEMPERATURE ( °C)
∆V
O
, OUTPUT VOLTAGE CHANGE (%)
50 75 100 125 150
V
I
= 15V
V
O
= 10V
I
L
= 1.5A
I
L
= 0.5A
Fig. 2 Current Limit
4
3
2
1
0
010 20
V
I
- V
O
, INPUT - OUTPUT VOLTAGE DIFFERENTIAL ( V
dc
)
IO, OUTPUT CURRENT (A)
30 40
T
J
= -55 °C
T
J
= 25 °C
T
J
= 150 °C
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
01020
V
I
- V
O
, INPUT - OUTPUT VOLTAGE DIFFERENTIAL ( V
dc
)
I
B
, QUIESCENT CURRENT (mA)
30 40
T
J
= -55 °C
T
J
= 25 °C
T
J
= 150 °C
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OM7602ST, OM7602NT
VOUT = 1.25V(1 + (R2/R1)) + IADJ(R2)
Fig. 7 - Standard Application
* CIN is required if regulator is located an appreciable distance from power supply filter.
** COUT is not needed for stability, however it does improve transient response.
Since IADJ is not controlled to less than 100µA, the error associated with this term is negligible in
most applications.
Typical Applications
Fig. 8 Adjustable Current Limiter
OM7602ST
OM7602NT
+25V
V
IN
Adjust
V
OUT
R1 V
O
I
O
1.25
R2
D
IN
1N4001
1N4001
D
IN
2N5640
V
SS
100
To provide current limiting of I
O
to the system
ground, the source of the FET must be tied to
a negative voltage below -1.25V.
R2 = V
REF
/ I
DSS
, R1 = V
REF
/ (I
OMAX
+ I
DSS
)
V
O
< (BV
DSS
+ 1.25V + V
SS
)
(I
LMIN
– I
DSS
) < I
O
< 1.5A
As shown 0 < I
O
< 1.0A
OM7602ST
OM7602NT
VIN
CIN*
0.1µF
COUT**
1.0µF
VOUT
+
R2
R1
240
IADJ Adjust
+
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OM7602ST, OM7602NT
Fig. 9 5V Electronic Shut Down Regulator
Fig. 10 Slow Turn-On Regulator
Fig. 11 Current Regulator
VIN
Adjust
VO
1N4002
TTL
Control
MPS2222
1K
720
120
+
OM7602ST
OM7602NT
D1
1.0µF
Minimum VOUT = 1.25V
D1 protects the device during an input short circuit
OM7602ST
OM7602NT
VIN VOIOUT
Adjust
R1
IADJ
IOUT = (VREF / R1) + IADJ = (1.25V / R1) + IADJ
10mA < IOUT < 1.5A
Adjust
OM7602ST
OM7602NT
1N4001
MPS2907
R2
VIN VO
10µF
+
240
50K
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OM7602ST, OM7602NT
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105
IR LEOMINSTER: 205 Crawford St., Leominster, Massachusetts 01453, Tel: (978) 534-5776
Data and specifications subject to change without notice.10/2006
Case Outline and Dimensions — TO-257AA
Part Numbering Nomenclature
3.05 [.120]
0.13 [.005]
0.71 [.028]
MAX.
B
5.08 [.200]
4.83 [.190]
10.92 [.430]
10.42 [.410]
1.14 [.045]
0.89 [.035]
16.89 [.665]
16.39 [.645]
321
15.88 [.625]
12.70 [.500]
0.88 [.035]
0.64 [.025]
Ø 0.50 [.020] CA B
2X 3X Ø
2.54 [.100]
C
10.66 [.420]
10.42 [.410]
A
13.63 [.537]
13.39 [.527]
3X Ø
3.81 [.150]
3.56 [.140]
NOT ES :
1. DIMENS IONING & T OLE RANCING PER ANS I Y14.5M-1994.
2. CONT ROLL ING DIMENS ION: INCH.
3. DIME NSIONS ARE S HOWN IN MIL LIMET ERS [INCHES ].
4. OUT LINE CONF ORMS T O JEDE C OUT LINE T O-257AA.
PIN ASSIGNMENTS
Pin # Description Pin # Description
1 ADJUST 1 ADJUST
2OUTPUT 2 OUTPUT
3 INPUT 3 INPUT
Tab ISOLATED Tab OUTPUT
ISOLATED
Front View
NON-ISOLATED
Front View
OM 7602 S/N T M
Device Number
Isolated / Non-Isolated
S = Isolated
N = Non-Isolated
Screening
M = MIL-PRF-38535
P = Minimal Screening
Package Code
T = TO-257AA
