Switching Regulator. SI-8105QL Datasheet

SI-8105QL Regulator. Datasheet pdf. Equivalent

SI-8105QL Datasheet
Recommendation SI-8105QL Datasheet
Part SI-8105QL
Description Step-Down Switching Regulator
Feature SI-8105QL; SI-8105QL Step-Down Switching Regulator with Current-Mode Control Features and Benefits ▪ Current-m.
Manufacture Sanken
Datasheet
Download SI-8105QL Datasheet




Sanken SI-8105QL
SI-8105QL
Step-Down Switching Regulator with Current-Mode Control
Features and Benefits
Current-mode control system employed
Excellent line regulation (60 mV maximum)
165 mΩ maximum on-resistance of built-in MOSFET
Output current 3.5 A
Wide range of input voltages (4.75 to 28 V), supports
24 V direct drive
Output voltage 0.5 to 24 V, compatible with various IC
power supply voltages, through low VREF of 0.5 V.
High efficiency, 94% maximum at VIN = 8 V, VO = 5 V,
and IO = 0.5 A
Operating frequency 350 kHz, supports downsizing of
smoothing choke coil
Soft start and output on/off functions built-in
Built-in protection:
Drooping overcurrent protection
Overtemperature protection
Undervoltage lockout (UVLO)
Package: 8-pin DIP
Description
The SI-8105QLis a step-down switching regulator IC, designed
as an output voltage regulator at the secondary stage of switch
mode power supplies.The current-mode control system permits
small ceramic capacitors to be used as output capacitors.
Together with the compact DIP8 package, this allows reduction
of regulator circuitry area on the PCB by approximately 50%
in comparison with conventional topologies.
Designed to save power, losses in the SI-8105QL are reduced
by controlling the maximum on-resistance of a built-in output
MOSFETto as low as 165 mΩ. Furthermore, die miniaturization
has been accomplished through a proprietary BCD process.
The SI-8105QLsupplies an output current of 3.5 Aand an output
voltage that is variable from 0.5 to 24 V, which is easily set to
a voltage compatible with the diverse reduced power supply
voltages required by signal processing ICs. Accepting a wide
input voltage range, from 4.75 to 28 V, the SI-8105QL can be
driven directly by a 24 V power supply.
Applications include power supplies for signal processing ICs
for memories and microcomputers used in plasma display panel
(PDP) TVs, liquid crystal display (LCD) TVs, computer hard
drives, and DVD recorders.
Not to scale
Functional Block Diagram
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27469.065, Rev. 1
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/



Sanken SI-8105QL
SI-8105QL Step-Down Switching Regulator with Current-Mode Control
Selection Guide
Part Number
SI8105QL-TL
Packing
1000 pieces per reel
Absolute Maximum Ratings
Characteristic
DC Input Voltage
DC Input Voltage
Allowable Power Dissipation
Symbol
VIN
VEN
PD
Remarks
Limited by internal thermal shutdown, mounted on a 70 mm × 60 mm
glass epoxy PCB with 1310 mm2 exposed copper area
Junction Temperature
TJ Internal thermal shutdown activates at approximately 140°C
Storage Temperature
Tstg
Thermal Resistance (Junction to Ambient)
RθJA
Mounted on a 70 mm × 60 mm glass epoxy PCB with 1310 mm2
exposed copper area
Thermal Resistance (Junction to Case)
RθJC
Rating
30
6
1.50
–30 to 150
–40 to 150
67
25
Unit
V
V
W
°C
°C
°C/W
°C/W
Recommended Operating Conditions*
Characteristic
DC Input Voltage Range
DC Output Current Range
Operating Junction
Temperature Range
Symbol
VIN
IO
TJOP
Remarks
VIN(min) is the greater of either 4.75 V or VO+3 V; except
if VO + 2 VIN VO + 3 V, then VIN(min) is set such that
IO 2 A
Using the circuit defined in the Typical Application
diagram and within PD limits
Min.
See
remarks
0
–30
Typ.
Operating Temperature
Range
TOP Operation within PD limits
–30 –
*Recommended operating range indicates conditions which are required for maintaining normal circuit functions shown in the
Electrical Characteristics table.
Max.
28
Units
V
3.5 A
125 °C
85 °C
27469.065, Rev. 1
SANKEN ELECTRIC CO., LTD.
2
[Date]



Sanken SI-8105QL
SI-8105QL Step-Down Switching Regulator with Current-Mode Control
ELECTRICAL CHARACTERISTICS1, valid at TA=25°C, unless otherwise noted
Characteristics
Symbol
Conditions
Min Typ Max Units
Reference Voltage
Output Voltage Temperature
Coefficient
VREF
VREF/T
VIN = 12 V, IO = 1.0 A
VIN = 12 V, IO = 1.0 A, TA = –25°C to 100°C
0.485
0.500
±0.05
0.515
V
mV/°C
Efficiency2
Operating Frequency
Line Regulation
Load Regulation
Overcurrent Protection Threshold
Quiescent Current 1
Quiescent Current 2
SS Terminal Leakage Current3
EN Terminal High Level Voltage
EN Terminal Low Level Voltage
EN Terminal Leakage Current
Error Amplifier Voltage Gain
Error Amplifier Transconductance
Current Sense To COMP
Transimpedance
η
fO
VLINE
VLOAD
IS
IIN
IIN(off)
ISSL
VCEH
VCEL
ICEH
AEA
GEA
1/GCS
VIN = 12 V, VO = 5 V, IO = 1 A
VIN = 16 V, VO = 5 V, IO = 1 A
VIN = 8 to 28 V, VO = 5 V, IO = 1 A
VIN = 12 V, VO = 5 V, IO = 0.1 to 3.5 A
VIN = 12 V, VO = 5 V
VIN = 12 V, VO = 5 V, IO = 0 A, VEN = open
VIN = 12 V, VO = 5 V, IO = 0 A,VEN = 0 V
VSSL = 0 V, VIN = 12 V
VIN = 12 V
VIN = 12 V
VEN = 0 V
– 90 – %
315 350 385 kHz
– 20 50 mV
– 20 50 mV
3.6 – 6.0 A
– 18 – mA
– – 20 μA
– 5 – μA
2.8 – – V
– – 2.0 V
– 1 – μA
– 1000 –
V/ V
– 800 – μA/V
– 0.35 –
V/A
Maximum Duty Cycle (On)
DCMAX
– 92 – %
Minimum On-Time
tMIN
– 100 –
ns
1Using circuit shown in Measurement Circuit diagram.
2Efficiency is calculated as: η(%) = ([VO × IO] / [VIN × IIN]) × 100.
3SS terminal enables soft start when a an external capacitor is connected to it. Because a pull-up resistor is provided inside the IC, no external voltage
can be applied to this terminal.
Measurement Circuit Diagram
C1
IIN
21
C4
7 IN
EN
3
BS SW
8
SS
IEN ISS
S I- 8105QL
GND
FB
CO M P
5
VIN VEN VSS
46
C3
C5
R3 R4
L1
Di R1
VFB R2
C2 IO
VO R L
Component
C1
C2
C3
C4
C5
Di
L1
R1
R2
R3
R4
Rating
10 μF / 50 V
47 μF / 25 V
1200 pF / 10 V
10 nF / 25 V
1000 pF
SPB-G56S
22 μH
46 kΩ
5.1 kΩ
20 kΩ
10 Ω
All performance characteristics given are typical values for circuit or
system baseline design only and are at the nominal operating voltage and
an ambient temperature, TA, of 25°C, unless otherwise stated.
27469.065, Rev. 1
SANKEN ELECTRIC CO., LTD.
3
[Date]







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