SANKEN SI-8205NHD_11

1-1-3 DC/DC Converter ICs
SI-8205NHD Full-Mold,
Surface-Mount,
Separate
CurrentExcitation
Mode Control,
Step-down
Synchronous
Switching
RectifierMode
Step-down
Regulator
Switching
ICs Mode
■Features
•
•
•
•
•
•
•
•
•
•
■Absolute Maximum Ratings
Compact surface-mount (HSOP8) package
Wide input voltage range (VIN): Vo + 3 to 43 V
Synchronous rectifier mode
Output current: 3 A
Reference voltage and accuracy of 0.5 V ±1%
Oscillation frequency: 200 kHz to 1 MHz
A ceramic capacitor can be used for output
Output can be disabled
Symbol
Ratings
Unit
VIN
PD
Tj
Tstg
θj-c
θj-a
46
1.35
–40 to +150
–40 to +150
40
74
V
W
°C
°C
°C/W
°C/W
Soft start function
Power supply for LCD module
Power supply for notebook PC
Conditions
When mounted on a 30 × 30 mm glass-epoxy board (with a 25 × 25 mm copper area)
When mounted on a 30 × 30 mm glass-epoxy board (with a 25 × 25 mm copper area)
■Recommended Operating Conditions
Parameter
Undervoltage Lock Out
■Applications
•
•
•
•
Parameter
Input Voltage (VIN Pin)
Power Dissipation
Junction Temperature
Storage Temperature
Thermal Resistance (Junction to Lead <1 pin>)
Thermal Resistance (Junction to Ambient Air)
Input Voltage Range
Output Current Range
Output Voltage Range
Operating Junction Temperature Range
Operating Temperature Range
Symbol
VIN
Io
Vo
Tjop
Top
Ratings
8 or Vo+3 to 43
0 to 3.0
0.5 to 24
–40 to +125
–40 to +85
Unit
V
A
V
°C
°C
*: The minimum value of the input voltage range is 8 V or Vo + 3V, whichever is higher.
Onboard local power supplies
Power supply for LBP/PPC
■Electrical Characteristics
Parameter
Reference Voltage
Temperature Coefficient of Reference Voltage
Efficiency
Oscillation Frequency 1
Oscillation Frequency 2
Line Regulation
Load Regulation
Overcurrent Protection Starting Current
Quiescent Circuit Current
Outflow Current at Low Voltage
EN/SS Pin
Open Voltage
On Threshold Voltage
OVP Start Voltage
Thermal Protection Start Temperature
Error Amplifier Voltage Gain
Error Amplifier Transformer Conductance
Current Sense Amplifier Impedance
Maximum ON Duty
Minimum ON Time
50
ICs
(Ta = 25°C and fo = 500kHz, unless otherwise specified)
Symbol
Vref
∆VREF/∆T
min.
0.495
η
fo1
fo2
∆VoLINE
∆VoLOAD
Is
IIN
IIN(OFF)
IEN/SS
VSSH
VC/EH
Vovp
Tj
AEA
GEA
GCS
DMAX
DMIN
Ratings
typ.
0.500
±0.05
90
200
1
50
50
3.1
max.
0.505
6.0
8
40
3.0
0.6
0.57
151
80
5
4.5
1.3
0.60
160
800
800
3.33
90
150
Unit
V
mV/°C
%
kHz
MHz
mV
mV
A
mA
µA
µA
6.0
2.0
0.63
V
V
V
Conditions
VIN=12V, Io=1.0A
VIN=12V, Io=1.0A, Ta=–40 to +85°C
VIN=12V, Vo=5V, Io=1.0A
VIN=12V, Vo=5V, Io=1A, Rfset=375kΩ
VIN=12V, Vo=5V, Io=1A, Rfset=75kΩ
VIN=8 to 43V, Vo to 5V, Io=1A
VIN=12V, Vo=5V, Io=0.1 to 3.0A
VIN=12V, Vo=5V
VIN=12V, Vcomp=0V
VIN=12V, VEN/ss=0V
VEN/SS=0V, VIN=12V
VIN=12V
VIN=12V
°C
V/V
µA/V
A/V
%
nsec
VIN=12V
VIN=12V
SI-8205NHD
■External Dimensions (HSOP8)
Pin Assignment
q GND
w EN/SS
e VIN
r FSET
t COMP
y FB
u BS
i SW
0.08±0.08
6.20
4.40
Pin 1 Mark
0.05±0.05
(Unit : mm)
Enlarged View of A
1.50
0.695 TYP
5.20
0.15
A
0.4
1.27
0.40
2.70
Plastic Mold Package Type
Flammability
: UL 94V-0
Product Mass
: Approx. 0.1 g
2.90
■Block Diagram
③VIN
+
CUR_SUS
REG
–
REG
REG_DRV
DRV_REG
REG
REG_DEV
REG
REG_DEV
⑦BS
REG_BIAS STANDBY
OVC
STANDBY
OCP_CMP
RegOK
REG_UVLO
H/S
Drv
BC
VIN_UVLO
VinOK
M1
Level
Shift
PWR_stage
REG
VinOK REG
REG
VinOK
Set PH
Fere Off
OSC_RAMP
Ramp
Phase_
logic
REG
GATE_logic
L/S
Drv
STANDBY
LSoft
INIT PH
INIT CC
Res PH
CUR_COMP
Level
Shift
LSoft
FB
FSET④
⑧SW
M2
Phase
REG
REG
VinOK
PH Open
OVT
BS_CHG
REG
Fere_Off
Set PH
RegOK
VinOK
Control_logic
OVT
TSD
BG
REG
INIT OVP
OVP
OVP_CMP
REG_BIAS
REG
SS_Ref
EN_SS
REG
BG
⑥FB
Ref
Err_AMP
STANDBY
REF
Rnf
SS_Rnf
①GND
⑤COMP
■Typical Connection Diagram
VIN
R5
3
VIN
2
EN/SS
C1
C4
7
8
BS
SW
L1
SI-8205NHD
4
C5
FSET
GND
1
R4
FB
COMP
5
C3
GND
C6
Open
C2
6
R1
R2
R3
VO
D1
GND
C1:10µF/50V×2
(murata:GRM55DB31H106KA87)
C2:22µF/16V×2
(murata:GRM32ER71A226KE20)
C3:270pF
(murata:GRM18 type)
C4:10µF
(murata: GRM18 type)
C5:1µF
(murata: GRM18 type)
L1:10µH
D1: SJPB-L6 (Sanken)
R1:9kΩ(When Vo=5V)
R2:1kΩ
R3:51kΩ
R4:150kΩ
R5:47Ω
ICs
51