SP2354 Datasheet, PDF (4/8 Pages) SYNC POWER Crop. – 1A Buck-Boost LED Driver

SP2354
1A Buck-Boost LED Driver
ELECTRICAL CHARACTERISTICS
(Unless otherwise stated, these specifications apply T_A=25°C; VIN=3.6V, RISET=22K)
Symbol
Parameter
Conditions
Min. Typ.
SUPPLY
VIN
IIN
Supply Voltage
Supply Current
UVLO Under Voltage Lockout Threshold
OSC
OUTPUT
Oscillator Frequency
2.9V <= VIN <= 5.5V
2.9V <= VIN <= 5.5V,
VEN1 = VEN2 = 0V
VIN < UVLO,
VEN1 = VEN2 = VIN
VIN Rising
VIN Falling
2.8
2.15
825
1000
5
2.6
2.35
925
Max. Unit
5.5 V
1350 uA
1 uA
10 uA
2.8 V
V
1050 KHz
VOUT
Maximum VOUT
LED Pin Open,
ILED = 1A
VISET
ISET1 and ISET2 Voltage
3.08K <= RISET <=20.5K
VLED
LED Pin Voltage
ILED = 1A
IRATIO*
LED Output Current to Programmed
Current Ratio
ILED = 500mA
ENABLE
VEN
Enable Shutdown Voltage
VEN(NOR) Enable Voltage Normal Operation
IEN
Enable 1 and Enable 2 Current
SOFT START
TSS
Soft-Start Period
0.9V to 2.1V
SWITCHING REGULATOR
R_PMOS**
RDS(on) for Switch A and D
R_NMOS**
RDS(on) for Switch B and C
ILPMOS Leakage Current for Switch A and D
VOUT = 3.6V
ILNMOS Leakage Current for Switch B and C
IF
Forward Switch Current Limit
Switch A
IR
Reverse Switch Current Limit Switch D, VOUT = 3.6V
* IRATIO = ILED/(IISET1 + IISET2)
** Guaranteed by Design
5
934
3150
0.2
-1
-1
-1
2.5
5.2
954
140
3550
5.4 V
967 mV
mV
3800
0.66
V
0.68 1.2 V
1 uA
300
uS
170
mΩ
130
mΩ
1 uA
1 uA
3.5
A
500
mA
2016/3/16 Ver.1
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