SM600/SM601/SM602/
SM610/SM611/SM612
SWITCHING REGULATOR POWER OUTPUT STAGES
DESCRIPTION
The SM600/601/602 and SM610/611/612 series of Power Output
Stages are especially designed to be driven with standard PWM
integrated circuits to form an efficient switching power supply.
The SM600, SM601 and SM602 are optimized for non-isolated
Buck and Buck-Boost application, where SM610, SM611 and
SM612 are best suited for DC-DC Boost type applications as well
as negative output Buck Converters. The hybrid circuit construc-
tion utilizes thick film resistors on a beryllia substrate for maxi-
mum thermal conductivity and resultant low thermal impedance.
All of the active elements in the hybrid are fully passivated.
FEATURES
•
Equivalent to the Unitrode PIC 600, 601, 602, 610, 611,
612
•
5A current capability
•
Designed and characterized for switching regulator
applications such as Buck, Boost, and Buck-Boost
type
•
Cost saving design reduces size, improves efficiency,
reduces noise and RFI
•
High operating efficiency at 2A typical performance -
Rise and fall time < 75ns
Efficiency > 85%
•
Electrically isolated, 4-pin, TO-66 hermetic case
HIGH RELIABILITY FEATURES
♦
Available with high reliability processing
FUNCTIONAL DIAGRAM
SM600/SM601/SM602
SM610/SM611/SM612
4/90 Rev 1.1 2/94
Copyright
©
1994
1
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
SM600/SM601/SM602/SM610/SM611/SM612
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Voltage, V
4 - 2
........................................
Output Voltage, V
1 - 2
.....................................
Drive Input Reverse Voltage, V
3 - 4
...............
Output Current, I
1
.........................................
Drive Current, I
3
...........................................
SM600
60V
60V
5V
5A
-0.2A
SM601
80V
80V
5V
5A
-0.2A
SM602
100V
100V
5V
5A
-0.2A
SM610
-60V
-60V
-5V
-5A
0.2A
SM611
-80V
-80V
-5V
-5A
0.2A
SM612
-100V
-100V
-5V
-5A
0.2A
Thermal Resistance
Power Switch,
θ
J - C
................................................... 4.0°C/W
Commutating Diode .................................................. 4.0°C/W
Case to Ambient,
θ
C - A
............................................ 60.0°C/W
Note 1. Exceeding these ratings could cause damage to the device.
Operating Junction Temperature
Hermetic (R Package) .................................................. 150°C
Storage Temperature Range ............................. -65°C to 150°C
Lead Temperature (Soldering, 10 Seconds) ................... 300°C
THERMAL DATA
R Package:
Thermal Resistance-
Junction to Case
,
θ
JC
.................. 4.0°C/W
Thermal Resistance-
Junction to Ambient
,
θ
JA
.............. 40°C/W
Note A. Junction Temperature Calculation: T
J
= T
A
+ (P
D
x
θ
JA
).
Note B. The above numbers for
θ
JC
are maximums for the limiting
thermal resistance of the package in a standard mount-
ing configuration. The
θ
JA
numbers are meant to be
guidelines for the thermal performance of the device/pc-
board system. All of the above assume no ambient
airflow.
RECOMMENDED OPERATING CONDITIONS
(Note 2)
SM600
Input Voltage, V
4 - 2
......................................... 50V
Output Voltage, V
1 - 2
...................................... 50V
Drive Input Reverse Voltage, V
3 - 4
................. 3V
Output Current, I
1
........................................... 4A
Drive Current, I
3
.............................................. -0.1A
SM601
70V
70V
3V
4A
-0.1A
SM602
90V
90V
3V
4A
-0.1A
SM610
-50V
-50V
-3V
-4A
0.1A
SM611
-70V
-70V
-3V
-4A
0.1A
SM612
-90V
-90V
-3V
-4A
0.1A
Operating Ambient Temperature Range
SM6XXR ....................................................... 0°C to 70°C
SM6XXHRR ........................................... -55°C to 125°C
Note 2. Range over which the device is functional.
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply for the operating ambient temperature of T
A
= 25°C. Low duty cycle pulse testing tech-
niques are used which maintains junction and case temperatures equal to the ambient temperature.)
Parameter
On-State Voltage
(Note 3)
Diode Forward Voltage
(Note 3)
Off-State Current
Diode Reverse Current
Test Conditions
I
4
= 2A(-2A), I
3
= -20mA (20mA)
I
4
= 5A(-5A), I
3
= -20mA (20mA)
I
4
= 2A(-2A)
I
4
= 5A(-5A)
V
4
= Rated input voltage
V
4
= Rated input voltage, T
A
= 125°C
V
1
= Rated output voltage
V
1
= Rated output voltage, T
A
= 125°C
SG600/601/602
SG610/611/612
Min. Typ. Max. Min. Typ. Max.
1.0
1.5
-1.0 -1.5
2.5
3.5
-2.5 -3.5
0.8
1.0
-0.8 -1.0
1.0
1.5
-1.0 -1.5
0.1
10
-0.1 -10
10
-10
1.0
10
-1.0 -10
500
-500
Units
V
V
V
V
µA
µA
µA
µA
Note 3. Pulse test: Duration = 300µs, Duty Cycle
≤
2%.
4/90 Rev 1.1 2/94
Copyright
©
1994
2
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
SM600/SM601/SM602/SM610/SM611/SM612
ELECTRICAL CHARACTERISTICS
Parameter
(continued)
Test Conditions
SG600/601/602
SG610/611/612
Min. Typ. Max. Min. Typ. Max.
20
50
30
450
50
70
85
40
75
50
75
150
20
50
30
450
50
70
85
40
75
50
75
150
Units
ns
ns
ns
ns
ns
ns
%
Dynamic Characteristics
(See Figures 1 & 2)
(Notes 4 & 5)
Current Delay Time
Current Rise Time
Voltage Rise Time
Voltage Storage Time
Voltage Fall Time
Current Fall Time
Efficiency
(Note 5)
AC TEST CIRCUIT AND SWITCHING TIME WAVEFORMS
(Note 6)
SM600
SM601
SM602
FIGURE 1 - SM600/601/602 SWITCHING SPEED CIRCUIT
FIGURE 2 - SM600/601/602 SWITCHING WAVEFORMS
Note 4. In switching an inductive load, the current will lead the voltage on turn-on and lag the voltage on turn-off (see Figure 2). Therefore, Voltage
Delay Time (t
DV
)
≅
t
di
+ t
ri
and Current Storage Time (t
si
)
≅
t
sv
+ t
fv
.
Note 5. The efficiency is a measure of internal power losses and is equal to Output Power divided by Input Power. The switching speed circuit of Figure
1, in which the efficiency measured, is represenative of typical operating conditions for the SM600 series switching regulators.
Note 6. SM610/611/612 Test Circuit and waveforms are identical but of opposite polarity (V
IN
= -25V, V
OUT
= -5V, I
DRIVE
= +20mA).
APPLICATION CIRCUITS
SM60X
SM60X
FIGURE 3 - STEP DOWN (BUCK) CONVERTER
FIGURE 4 - NEGATIVE OUTPUT DOWN/UP (BUCK-BOOST) CONVERTER
4/90 Rev 1.1 2/94
Copyright
©
1994
3
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
SM600/SM601/SM602/SM610/SM611/SM612
APPLICATION CIRCUITS
(continued)
SM61X
FIGURE 5 - STEP UP (BOOST) CONVERTER
CONNECTION DIAGRAMS & ORDERING INFORMATION
Package
4-PIN TO-66 METAL CAN
R - PACKAGE
(See Note Below)
Part No.
SM600R
SM600HRR
SM601R
SM601HRR
SM602R
SM602HRR
SM610R
SM610HRR
SM611R
SM611HRR
SM612R
SM612HRR
Ambient
Temperature Range
0°C to 70°C
-55°C to 125°C
0°C to 70°C
-55°C to 125°C
0°C to 70°C
-55°C to 125°C
0°C to 70°C
-55°C to 125°C
0°C to 70°C
-55°C to 125°C
0°C to 70°C
-55°C to 125°C
Connection Diagram
POSITIVE OUTPUT
1
2
4
3
POSITIVE INPUT
COMMON
DRIVE
NEGATIVE OUTPUT
1
2
4
3
NEGATIVE INPUT
COMMON
DRIVE
Note 1. All packages are viewed from the top.
2. Case is electrically isolated.
3. Consult factory for additional screening available.
4/90 Rev 1.1 2/94
Copyright
©
1994
4
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
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