SPI-8001TW Datasheet, PDF (1/4 Pages) Allegro MicroSystems – Dual 1.5 A, DC/DC Step-Down Converter

1-1-3 DC/DC Converter ICs
SPI-8001TW/SPI-8002TW/SPI-8003TW 2-Output, Step-down Switching Mode
■Features
• 2 regulators combined in one package
• Output current: 1.5A × 2 (HSOP 16 Pin
Surface mount package)
• High efficiency: TYP80% (SPI-8001TW),
TYP78% (SPI-8002TW)
• Variable output voltage: 1.0 to 16V (SPI-
8001TW), 1.0 to 24V (SPI-8002TW)
• Built-in reference oscillator (250kHz): Enables
to downsize a choke-coil
• Low circuit current consumption: ≤ 1µA (at
output OFF)
• High accuracy reference voltage: ±1%
• Built-in foldback-overcurrent and thermal
protection circuits
• Built-in ON/OFF circuit (soft start available) –
per output
■Absolute Maximum Ratings^*1
Parameter
Input Voltage
Power Dissipation^{*2, *3}
Junction Temperature
Storage Temperature
Thermal Resistance (junction to case)^*2
Thermal Resistance (junction to ambient air)^*2
Symbol
VIN
VCC
VC/E
PD
Tj
Tstg
θ j-c
θ j-a
Ratings
SPI-8001TW
SPI-8002TW
21
40
21
40
21
40
3.0
+135
–40 to +135
9.0
35.8
SPI-8003TW
40
40
40
+150
–40 to +150
Unit
V
V
V
W
°C
°C
°C/W
°C/W
*1: Absolute maximum ratings show the destructive limit. No parameter should exceed the ratings in transient or normal
operations.
*2: When mounted on glass-epoxy board 70cm² (copper laminate area 30.8cm²).
*3: Limited by thermal protection.
■Applications
• Onboard local power supplies
• OA equipment
• For stabilization of the secondary-side output voltage of switching power supplies
■Recommended Operating Conditions^*1
Ratings
Parameter
Symbol
SPI-8001TW
SPI-8002TW
SPI-8003TW
Unit
min.
max.
min.
max.
min.
max.
VIN
VO+3
20
VO+3
38
VO+3
38
V
Input Voltage Range
VCC
4.5
20
4.5
38
4.5
38
V
VC/E
20
38
38
V
Output Voltage Range
VO
1
16
1
24
1
24
V
Output Current Range
IO
1.5
1.5
1.5
A
Operating Junction Temperature Range
Tjop
–30
+135
–30
+135
–30
+125
°C
Operating Temperature Range
Top
–30
+135
–30
+135
–30
+85
°C
*1: Recommended operating conditions show the operating conditions required for the normal circuit function described in the electrical characteristics.
These conditions must be followed in actual use.
60 ICs