UNIVERSAL DC/DC CONVERTER
FSP34063
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
Parameter
Rating
40
-0.3~+40
40
Unit
V
V
V
V
V
V
mA
A
Power Supply Voltage
Comparator Input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage(VPin1=40V)
Switch Collector to Emitter Voltage
Driver Collector Voltage
VIR
VC(switch)
VE(switch)
VCE(switch)
VC(driver)
IC(driver)
ISW
40
40
40
100
1.6
Driver Collector Current(Note1)
Switch Current
PD
θJA
PD
θJA
600
160
1.25
100
mW
℃/W
W
SOP8L: TA=25℃
Thermal Resistance
PDIP8L: TA=25℃
Thermal Resistance
Power Dissipation and Thermal
Characteristics
℃/W
TJ
Operating Junction Temperature
+150
0~+70
-40~+85
℃
℃
℃
TA
Operating Ambient Temperature Range
Storage Temperature Range
Tstg
-65~+150
Notes: 1.Maximum package power dissipation limits must be observed.
2.ESD data available upon request.
ELECTRICAL CHARACTERISTICS(VCC=5V, UNLESS OTHERWISE NOTED)
Symbol
Oscillator section
fosc
Parameter
Test Conditions
Min. Typ. Max.
Unit
Frequency
Charge Current
Discharge Current
Discharge to Charge
Current Ratio
VPin 5=0V, CT=1.0nF, TA=25℃
VCC=5.0V to 40V, TA=25℃
VCC=5.0V to 40V, TA=25℃
24
24
33
30
42
42
kHz
µA
µA
Ichg
Idischg
140
200
260
Idischg/Ichg
Vipk(sense)
Pin7 to Vcc, TA=25℃
Ichg=Idischg, TA=25℃
5.2
6.5
7.5
Current Limit Sense
Voltage
300
400
450
mV
Output switch section
Saturation Voltage,
VCE(sat)
I
SW=1.0A, Pins 1,8 connected
1.0
1.3
0.7
V
V
Darlington Connection
Saturation Voltage,
Darlington Connection
DC Current Gain
Collector Off-State
Current
VCE(sat)
hFE
ISW=1.0A, ID=50mA, Forced β120
ISW=1.0A, VCE=5.0V, TA=25℃
VCE=40V
0.45
75
50
IC(off
)
0.01
100
µA
Comparator section
Threshold Voltage
TA=25℃
T=0℃~75℃
1.225 1.25 1.275
Vth
V
1.21
1.29
Threshold Voltage Line
Regulation
Reg(line)
VCC=3.0V to 40V
1.4
6.0
mV
Total device
VCC=5.0V to 40V, CT=1.0nF,
Pin7=VCC, VPin5＞Vth, Pin2=Gnd,
remaining pins open
ICC
Supply Current
3.5
mA
Note: 3.Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient
temperature as possible.
4.If the output switch is driven into hard saturation(non-Darlington configuration) at low switch currents(≤300mA)
and high driver currents(≥30mA), it may take up to 2.0µs for it to come out of saturation. This condition will
shorten the off time at frequencies≥30kHz, and is magnified at high temperatures. This condition does not occur
with a Darlington configuration, since the output switch cannot saturate. If a non-Darlington configuration is
2007-1-25
2/10
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