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SM625 Datasheet

(SM62x) SWITCHING REGULATOR POWER OUTPUT STAGES

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SM625/SM626/SM627
SWITCHING REGULATOR POWER OUTPUT STAGES
DESCRIPTION
The SM625/626/627 series of Power Output Stages are espe-
cially designed to be driven with standard PWM integrated
circuits to form an efficient switching power supply. The SM625,
SM626 and SM627 are optimized for non-isolated Buck and
Buck-Boost application. The hybrid circuit construction utilizes
thick film resistors on a beryllia substrate for maximum thermal
conductivity and resultant low thermal impedance. All of the
active elements in the hybrid are fully passivated.
FEATURES
Equivalent to the Unitrode PIC 625, 626, 627
15A 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 frequency (to > 100KHz) results in
smaller inductor-capacitor filter and improved power
supply response time
High operating efficiency at 7A typical performance -
Rise and fall time < 300ns
Efficiency > 85%
Electrically isolated, 4-pin, TO-66 hermetic case
HIGH RELIABILITY FEATURES
Available with high reliability processing
FUNCTIONAL DIAGRAM
SM625/SM626/SM627
4/90 Rev 1.1 2/94
Copyright © 1994
LINFINITY Microelectronics Inc.
1 11861 Western Avenue Garden Grove, CA 92841
(714) 898-8121 FAX: (714) 893-2570




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SM625 Datasheet Preview

SM625 Datasheet

(SM62x) SWITCHING REGULATOR POWER OUTPUT STAGES

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SM625/SM626/SM627
ABSOLUTE MAXIMUM RATINGS (Note 1)
SM625 SM626 SM627
Thermal Resistance
Input Voltage, V ......................................... 60V
4-2
80V 100V
Output Voltage, V1 - 2 ...................................... 60V
80V 100V
Drive Input Reverse Voltage, V3 - 4 ................. 5V 5V 5V
Output Current, I .......................................... 15A 15A 15A
1
Drive Current, I3 ............................................. -0.4A
-0.4A
-0.4A
Operating Junction Temperature
Power Switch, θJ - C ................................................... 4.0°C/W
Commutating Diode .................................................. 4.0°C/W
Hermetic (R Package) .................................................. 150°C
Storage Temperature Range ............................. -65°C to 150°C
Case to Ambient, θC - A ............................................ 60.0°C/W Lead Temperature (Soldering, 10 Seconds) ....................300°C
Note 1. Exceeding these ratings could cause damage to the device.
THERMAL DATA
R Package:
Thermal Resistance-Junction to Case, θJC .................. 4.0°C/W
Thermal Resistance-Junction to Ambient, θJA .............. 40°C/W
Note A. Junction Temperature Calculation: TJ = TA + (PD x θJA).
Note B. The above numbers for θJC are maximums for the limiting
thermal resistance of the package in a standard mount-
ing configuration. The θJA 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)
SM625 SM626
Input Voltage, V4 - 2 .........................................
Output Voltage, V1 - 2 ......................................
Drive Input Reverse Voltage, V .................
3-4
Output Current, I1 ..........................................
Drive Current, I3 .............................................
50V
50V
4V
13A
-0.3A
Operating Ambient Temperature Range
70V
70V
4V
13A
-0.3A
SM6XXR ....................................................... 0°C to 70°C
SM6XXHRR ........................................... -55°C to 125°C
Note 2. Range over which the device is functional.
SM627
90V
90V
4V
13A
-0.3A
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply for the operating ambient temperature of TA = 25°C. Low duty cycle pulse testing tech-
niques are used which maintains junction and case temperatures equal to the ambient temperature.)
Parameter
Test Conditions
On-State Voltage (Note 3)
Diode Forward Voltage (Note 3)
Off-State Current
Diode Reverse Current
I = 7A(-7A), I = -30mA (30mA)
43
I4 = 15A(-15A), I3 = -30mA (30mA)
I4 = 7A(-7A)
I = 15A(-15A)
4
V4 = Rated input voltage
V4 = Rated input voltage, TA = 125°C
V = Rated output voltage
1
V1 = Rated output voltage, TA = 125°C
Note 3. Pulse test: Duration = 300µs, Duty Cycle 2%.
SG625/626/627
Min. Typ. Max.
1.0 1.5
2.5 3.5
0.85 1.25
0.95 1.75
0.1 10
10
1.0 10
500
Units
V
V
V
V
µA
µA
µA
µA
4/90 Rev 1.1 2/94
Copyright © 1994
LINFINITY Microelectronics Inc.
2 11861 Western Avenue Garden Grove, CA 92841
(714) 898-8121 FAX: (714) 893-2570


Part Number SM625
Description (SM62x) SWITCHING REGULATOR POWER OUTPUT STAGES
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