SM8121A Datasheet, PDF (4/19 Pages) Nippon Precision Circuits Inc – White LED Driver IC

SM8121A
SPECIFICATIONS
Absolute Maximum Ratings
Parameter
Supply voltage range
Input voltage range
SW output voltage range
SW input current
Power dissipation
Operating temperature range
Storage temperature range
Symbol
Rating
Unit
V _DD
−0.3 to 6.5
V
V _IN
V_SS – 0.3 to V_DD + 0.3
V
V _SW
–0.3 to 27
V
I _SW
500
mA
P_D
250 (Ta = 25°C)
mW
T_opr
–40 to 85
°C
T _stg
−55 to 125
°C
Electrical Characteristics
V_DD = 3.6V, V_SS = 0V, Ta = 25°C unless otherwise noted
Parameter
Supply voltage
Maximum output voltage
Standby current
Quiescent current
SW-Tr ON resister
SW-Tr leak current
Switching frequency
Maximum duty
Input voltage
Input current
Soft-start time
FB voltage
Coil inductance
Pin
Symbol
Condition
VDD
V _DD
SW
V_OUT
VDD
I _STB
V_CE = 0V
V_FB = 1.0V
VDD
I _DD
V_FB = 0V
SW
R_ON I_SW = 100mA, V_DD = 3.6V
SW
I_LEAK V_SW = V_DD
SW
f_OSC V_FB = 0V
SW
Duty V_FB = 0V
V_IH
CE
V_IL
CE
I_CE
V_CE = 3.6V
FB
I_FB
V_FB = 0.5V
SW
T _SS
FB
V _FB
SW
L _SW
Rating
Unit
min
typ
max
2.3
3.6
5.5
V
–
–
25
V
–
–
1.0
µA
–
150
300
µA
–
400
800
µA
–
2.0
3.0
Ω
–
–
1.0
µA
0.9
1.0
1.1
MHz
65
75
85
%
2.0
–
–
V
–
–
0.6
V
–
5.0
10
µA
–1.0
–
1.0
µA
–
500
–
µs
0.49
0.50
0.51
V
–
–
10
µH
NIPPON PRECISION CIRCUITS INC.—4