FAN5346 データシートの表示（PDF） - Fairchild Semiconductor
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FAN5346 Datasheet PDF : 14 Pages
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Electrical Specifications
VIN = 2.5V to 5.5V and TA = -40°C to +85°C unless otherwise noted. Typical values are at TA = +25°C and VIN = 3.6V.
Symbol
Parameter
Conditions
Min. Typ. Max. Unit
Power Supplies
ISD
Shutdown Supply Current
IQ(ACTIVE) Quiescent Current at ILOAD = 0mA
VUVLO Under-Voltage Lockout Threshold
VUVHYST Under-Voltage Lockout Hysteresis
EN: Enable Pin
VIH
HIGH-Level Input Voltage
VIL
LOW-Level Input Voltage
REN
fPWM
tSD
EN Pull-Down Resistance
PWM Dimming Frequency(3)
EN LOW, Shutdown Pulse Width
Feedback and Reference
VFB
Feedback Voltage
IFB
Feedback Input Current
Power Outputs
RDS(ON)_Q1 Boost Switch On Resistance
ISW(OFF) SW Node Leakage(2)
ILIM-PK Boost Switch Peak Current Limit
EN = GND
Device Not Switching, No Load
VIN Rising
VIN Falling
VIN = 3.6V; from Falling Edge of EN
ILED = 20mA from -40°C to +85°C,
2.5V ≤ VIN ≤ 5.5V
VFB = 250mV
VIN = 3.6V, ISW = 100mA
VIN = 2.5V, ISW = 100mA
EN = 0, VIN = VSW = VOUT = 5.5V,
VLED = 0V
FAN5346S20X: VIN = 3.2V to 4.3V,
TA =-20°C to +60°C, VF = 3.4V, 4 LEDs
FAN5346S30X
2.10
1.80
1.2
200
5
230
200
500
0.30
300
2.35
2.05
250
300
250
0.1
600
650
0.1
300
750
0.90 μA
μA
2.60
V
2.30
mV
V
0.4
V
400
kΩ
100 kHz
1
ms
270 mV
1.0
μA
mΩ
2.0
μA
400
mA
1000
Oscillator
fSW
Boost Regulator Switching
Frequency
0.95
1.15
1.35 MHz
Output and Protection
VOVP
Boost Output Over-Voltage
Protection
OVP Hysteresis
FAN5346S20X
FAN5346S30X
FAN5346S20X
FAN5346S30X
18.0
20.0
21.5
27.5
30.0 32.5
0.8
V
1.0
VTLSC
VOUT Short-Circuit Detection
Threshold
VOUT Falling
VIN – 1.4
V
VTHSC
DMAX
DMIN
TTSD
VOUT Short-Circuit Detection
Threshold
Maximum Boost Duty Cycle(3,4)
Minimum Boost Duty Cycle(3,4)
Thermal Shutdown
VOUT Rising
VIN – 1.2
V
85
%
20
150
°C
THYS Thermal Shutdown Hysteresis
35
°C
Notes:
2. SW leakage current includes the leakage current of two internal switches; SW to GND and SW to VOUT.
3. Not tested in production; guaranteed by design.
4. Application should guarantee that minimum and maximum duty cycle fall between 20-85% to meet the specified range.
© 2011 Fairchild Semiconductor Corporation
FAN5346 • Rev. 1.0.1
5
www.fairchildsemi.com
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