s-8337aaca-t8t1g Seiko Instruments Inc., s-8337aaca-t8t1g Datasheet - Page 6

• Manufacturer Part Number: s-8337aaca-t8t1g
• Description: Step-up, 1.2 Mhz High-frequency, Pwm Control Switching Regulator Controller
• Manufacturer: Seiko Instruments Inc.

*1. The recommended range of the resistance (R
6
*2. The recommended range of the resistance (R
*3. The short-circuit protection time can be set by the external capacitor, and the maximum set value by the external capacitor is unlimited
Timer latch reset voltage
Operating input voltage
FB voltage
Current consumption
EXT pin output current
FB voltage temperature
coefficient
FB pin input current
Oscillation frequency
Oscillation frequency
temperature coefficient
Max. duty
Soft-start time
Short-circuit protection
delay time
UVLO detection voltage
UVLO hysteresis width
CC pin output current
STEP-UP, 1.2 MHz HIGH-FREQUENCY, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8337/8338 Series
1.133 MHz). However, the oscillation frequency is in the range of typical values when an ideal resistor is externally connected, so
actually the fluctuation of the IC (±10%) must be considered.
However, the maximum duty is in the range of typical values when an ideal resistor is externally connected, so actually the fluctuation
of the IC (±5%) must be considered.
when an ideal case is assumed. But, use C
discharge time of the capacitor.
Electrical Characteristics
1. S-8337 Series
Parameter
*2
*3
*1
MaxDuty
V
Symbol
V
UVLOHYS
ΔV
I
V
I
Δf
ΔTa
ΔTa
t
I
V
I
I
EXTH
EXTL
V
f
t
PRO
UVLO
CCH
I
CCL
SS1
osc
RTLT
FB
SS
FB
osc
IN
FB
f
V
V
V
Ta = −40°C to +85°C
f
f
f
V
Waveform on EXT pin is measured.
Ta = −40°C to +85°C
f
f
MaxDuty = 88.5% (R
MaxDuty = 77% (R
MaxDuty = 47% (R
t
Selected in three steps
t
(CSP = 0.1 μF)
V
Selected in 0.1 V steps
V
Selected in 0.1 V steps
V
V
osc
osc
osc
osc
osc
osc
SS
PRO
FB
EXT
EXT
FB
UVLO
UVLOHYS
FB
FB
= 10 ms, 15 ms, 20 ms
Table 4 Electrical Characteristics
= 700 kHz
= 1133 kHz (R
= 700 kHz (R
= 286 kHz (R
= 700 kHz
= 700 kHz (R
= 0.95 V
= 0.9 V
= 2 V
= 0 V
= 50 ms
= V
= 0.4 V
SP
= 1.5 V to 2.3 V
Duty
osc
Seiko Instruments Inc.
= approximately 0.47 μF as a target maximum value due to the need to consider the
IN
/R
= 0.1 V to 0.3 V
) for setting the oscillation frequency is R
− 0.4 V
osc
Conditions
) for setting the maximum duty is R
⎯
⎯
⎯
⎯
OSC
OSC
OSC
OSC
Duty
Duty
= 200 kΩ)
= 510 kΩ)
= 200 kΩ)
Duty
= 120 kΩ)
= 300 kΩ)
= 820 kΩ)
= 100 kΩ)
(Unless otherwise specified: V
MaxDuty
V
× 0.75
× 0.95
0.985
UVLOHYS
V
× 0.9
× 0.6
Min.
−0.1
37.5
37.5
100
−75
1.8
0.7
f
− 5
t
UVLO
⎯
⎯
⎯
⎯
osc
SS
Duty
MaxDuty
V
osc
/R
1.000
V
UVLOHYS
−100
±100
1000
Typ.
osc
400
160
−50
f
1.0
t
50
UVLO
50
⎯
⎯
= 120 kΩ to 510 kΩ (f
osc
SS
= 0.5 to 4.1 (MaxDuty = 47 to 88.5%).
MaxDuty
V
× 1.05
1.015
V
UVLOHYS
−37.5
× 1.1
× 1.5
× 1.4
Max.
+0.1
IN
700
−60
6.0
+ 5
1.3
f
t
UVLO
75
75
⎯
⎯
⎯
osc
SS
= 3.3 V, Ta = 25°C)
ppm/°C
ppm/°C
Unit
kHz
mA
mA
mV
ms
ms
μA
μA
μA
μA
OSC
%
V
V
V
V
Rev.3.1
= 286 kHz to
Circuit
Test
2
2
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
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