S-8351D40MC-J8ZT2G Seiko Instruments, S-8351D40MC-J8ZT2G Datasheet - Page 23

• Manufacturer Part Number: S-8351D40MC-J8ZT2G
• Description: IC REG SW 100KHZ 4V SOT23-5
• Manufacturer: Seiko Instruments
• Type: Step-Up (Boost)r

Specifications of S-8351D40MC-J8ZT2G

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 4V
• Frequency - Switching: 100kHz
• Voltage - Input: 0.9 ~ 10 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Power - Output: 250mW
• Output Voltage: 4 V
• Input Voltage: 10 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Rev.3.0
5. V
The D type provides separate internal circuit power supply (VDD pin) and output voltage setting pin (VOUT pin) in the
IC, making it ideal for the following applications.
Cautions 1. This IC starts a step-up operation at V
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
DD
(1) Changing the output voltage value using an external resistor
(2) Setting a high output voltage value, such as +15 V
_00
/ V
OUT
2. Choose external resistors R
3. Attach a capacitor (C
Separate Type (For S-8351/8352 Series D Type)
voltage and frequency of the oscillator. (Input a voltage of 1.8 V or more at the VDD pin for all
products with a setting less than 1.9 V.) An input voltage of 1.8 V or more at the VDD pin allows
connection of the VDD pin to either the input voltage VIN pin or output VOUT pin.
is impedance between the VOUT pin and VSS pin in the IC chip. The internal resistance
between the VOUT pin and VSS pin is as follows :
(1) S-835xx18 : 2.1 MΩ to 14.8 MΩ
(2) S-835xx20 : 1.4 MΩ to 14.8 MΩ
(3) S-835xx30 : 1.4 MΩ to 14.2 MΩ
(4) S-835xx50 : 1.4 MΩ to 12.1 MΩ
oscillation of the output voltage occurs. Calculate C
C
C
[ ]
F
=
2
•
π
•
R
A
1
•
20
C
) in parallel to the R
kHz
Seiko Instruments Inc.
A
and R
B
so as to not affect the output voltage, considering that there
DD
= 0.8 V, but set 1.8 ≤ V
A
resistance when an unstable event such as
C
using the following equation :
DD
≤ 10 V to stabilize the output
S-8351/8352 Series
23