Datasheet SM625, SM626, SM627 Datasheet (LINFINITY)

查询SM625供应商

SM625/SM626/SM627

SWITCHING REGULATOR POWER OUTPUT STAGES

DESCRIPTION

The SM625/626/627 series of Power Output Stages are espe­cially 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.

FUNCTIONAL DIAGRAM

SM625/SM626/SM627

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

♦♦

4/90 Rev 1.1 2/94 LINFINITY Microelectronics Inc.

Copyright  1994 11861 Western Avenue

1 [phone]

∞ ∞

∞ Garden Grove, CA 92841

∞ ∞

∞∞

∞ FAX: [phone]

∞∞

ABSOLUTE MAXIMUM RATINGS (Note 1)

Input Voltage, V
Output Voltage, V
Drive Input Reverse Voltage, V
Output Current, I
Drive Current, I

Thermal Resistance

Power Switch, θ

Commutating Diode ..................................................

Case to Ambient, θ

Note 1. Exceeding these ratings could cause damage to the device.

...................................................

J - C

............................................

C - A

......................................... 60V 80V 100V

4 - 2

...................................... 60V 80V 100V

1 - 2

.......................................... 15A 15A 15A

1

............................................. -0.4A -0.4A -0.4A

3

4.0°C/W

4.0°C/W

60.0°C/W

THERMAL DATA

R Package:

Thermal Resistance­Thermal Resistance-

Junction to Case, θ
Junction to Ambient, θ

JC

.................. 4.0°C/W

.............. 40°C/W

JA

RECOMMENDED OPERATING CONDITIONS (Note 2)

Input Voltage, V
Output Voltage, V
Drive Input Reverse Voltage, V
Output Current, I
Drive Current, I

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.

......................................... 50V 70V 90V

4 - 2

...................................... 50V 70V 90V

1 - 2

.......................................... 13A 13A 13A

1

............................................. -0.3A -0.3A -0.3A

3

SM625/SM626/SM627

SM625 SM626 SM627

................. 5V 5V 5V

3 - 4

Operating Junction Temperature

Hermetic (R Package) ..................................................

Storage Temperature Range .............................

Lead Temperature (Soldering, 10 Seconds) ....................

Note A. Junction Temperature Calculation: TJ = TA + (PD x θJA).
Note B. The above numbers for

thermal resistance of the package in a standard mount­ing configuration. The θ
guidelines for the thermal performance of the device/pc­board system. All of the above assume no ambient
airflow.

SM625 SM626 SM627

................. 4V 4V 4V

3 - 4

θJC are maximums for the limiting

numbers are meant to be

JA

150°C

-65°C to 150°C
300°C

ELECTRICAL CHARACTERISTICS

(Unless otherwise specified, these specifications apply for the operating ambient temperature of TA = 25°C. Low duty cycle pulse testing tech­niques are used which maintains junction and case temperatures equal to the ambient temperature.)

Test ConditionsParameter Units

On-State Voltage

(Note 3)

Diode Forward Voltage (Note 3)
Off-State Current
Diode Reverse Current

Note 3. Pulse test: Duration = 300µs, Duty Cycle ≤ 2%.

4/90 Rev 1.1 2/94 LINFINITY Microelectronics Inc.

Copyright  1994 11861 Western Avenue

I4 = 7A(-7A), I3 = -30mA (30mA)
I

= 15A(-15A), I3 = -30mA (30mA)

4

= 7A(-7A)

I

4

I

= 15A(-15A)

4

V

= Rated input voltage

4

= Rated input voltage, TA = 125°C

V

4

V

= Rated output voltage

1

= Rated output voltage, TA = 125°C

V

1

2 [phone]

SG625/626/627

Min. Typ. Max.

1.5

1.0

3.5

2.5

1.25

0.85

1.75

0.95
10

0.1
10

10

1.0

500

∞ ∞

∞ Garden Grove, CA 92841

∞ ∞

∞∞

∞ FAX: [phone]

∞∞

V
V
V
V

µA
µA
µA
µA

ELECTRICAL SPECIFICATIONS (continued)

Test ConditionsParameter Units

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)

SM625
SM626
SM627

SM625/SM626/SM627

SG625/626/627

Min. Typ. Max.

35
65
40

700

70

175

85

60

150

60

175
300

ns
ns
ns
ns
ns
ns

%

FIGURE 1 - SM625/626/627 SWITCHING SPEED CIRCUIT

FIGURE 2 - SM625/626/627 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

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.

) ≅ tdi + tri and Current Storage Time (tsi) ≅ tsv + tfv .

DV

APPLICATION CIRCUITS

SM62XSM62X

FIGURE 4 - NEGATIVE OUTPUT DOWN/UP (BUCK-BOOST) CONVERTERFIGURE 3 - STEP DOWN (BUCK) CONVERTER

4/90 Rev 1.1 2/94 LINFINITY Microelectronics Inc.

Copyright  1994 11861 Western Avenue

3 [phone]

∞ ∞

∞ Garden Grove, CA 92841

∞ ∞

∞∞

∞ FAX: [phone]

∞∞

CONNECTION DIAGRAMS & ORDERING INFORMATION (See Note Below)

SM625/SM626/SM627

4-PIN TO-66 METAL CAN
R - PACKAGE

Part No.Package

Ambient

Temperature Range

SM625R 0°C to 70°C
SM625HRR -55°C to 125°C
SM626R 0°C to 70°C
SM626HRR -55°C to 125°C
SM627R 0°C to 70°C
SM627HRR -55°C to 125°C

Connection Diagram

POSITIVE OUTPUT POSITIVE INPUT

4

1

23

DRIVECOMMON

Note 1. All packages are viewed from the top.

2. Case is electrically isolated.

3. Contact factory for additional screening available.

4/90 Rev 1.1 2/94 LINFINITY Microelectronics Inc.

Copyright  1994 11861 Western Avenue

4 [phone]

∞ ∞

∞ Garden Grove, CA 92841

∞ ∞

∞∞

∞ FAX: [phone]

∞∞