tb62731fug TOSHIBA Semiconductor CORPORATION, tb62731fug Datasheet - Page 4

• Manufacturer Part Number: tb62731fug
• Description: Step-up Dc-dc Converter For White Led Driver
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Electrical Characteristics (unless otherwise specified,
Supply voltage
Current consumption at operation
Current consumption at standby
SHDN pin current
Internal MOS transistor on-resistance
Internal MOS transistor switching
frequency
Pin A voltage
Pin A current
Pin A leakage current
Set LED current (mean)
Pin K derating start ambient
temperature
Note 1: Due to operation of the temperature derating function, measure when Ta = 25°C.
Note 2: This rating is guaranteed by the design.
Note that fluctuation in R_sens resistors is not included in the specified value.
I
o
Characteristics
may be different from the specified value due to the relation between the inductor value and load.
I
CC
I
I_SHDN
CC
Symbol
V
I
I
f
oz
V
Ron
o
Tdel
(SHDN)
OSC
o
I
CC
(ON)
(A)
o
(A)
(A)
circuit
Test
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
4
V
SHDN = 0 V
SHDN = V
Built-in pull-down resistor
I (A) < = 270 mA,
Including detected resistance
V
R_sens = 1.8 Ω
T
Equivalent to R_sens = 1.8 Ω,
L = 4.7 µH, V
opr
CC
CC
= 3.6 V
= 3.2~4.2 V,
= 25°C
Test condition
CC
,
O
⎯
⎯
⎯
⎯
⎯
= 16 V
Ta = −40~85°C, V
(Note 1)
17.6
Min
275
210
3.0
28
⎯
⎯
⎯
⎯
⎯
⎯
(Note 2)
Typ.
350
240
TB62731FUG
0.6
0.5
4.2
2.0
0.5
20
CC
⎯
⎯
45
= 3.0~5.5 V)
2006-06-14
22.4
Max
425
270
5.5
0.9
1.0
2.5
⎯
⎯
7
1
Unit
kHz
mA
mA
mA
µA
µA
µA
°C
V
Ω
V