S-8521A25MC-AXK-T2 Seiko Instruments, S-8521A25MC-AXK-T2 Datasheet - Page 3

• Manufacturer Part Number: S-8521A25MC-AXK-T2
• Description: DC/DC Switching Regulators 2.5V 60uA Step-Down
• Manufacturer: Seiko Instruments

Specifications of S-8521A25MC-AXK-T2

• Output Voltage: 2.5 V
• Output Current: 120 mA
• Input Voltage: 2.5 V to 10 V
• Duty Cycle (max): 100 %
• Switching Frequency: 180 KHz
• Mounting Style: SMD/SMT
• Package / Case: SOT-23-5
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Rev.9.0
1. S-8520 Series
2. S-8521 Series
Block Diagrams
Remark All the diodes in the figure are parasitic diodes.
Remark All the diodes in the figure are parasitic diodes.
V
V
STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
IN
IN
_00
+
+
C
C
IN
IN
Tr
Tr
SD
SD
EXT
VIN
EXT
VIN
Seiko Instruments Inc.
ON/OFF
ON/OFF
______
______
Figure 1
Figure 2
PWM / PFM switching
Oscillation
Oscillation
circuit
circuit
control circuit
PWM control
circuit
source with soft-start
source with soft-start
Reference voltage
Reference voltage
L
L
V
V
ON/ OFF
ON/ OFF
______
______
−
+
−
+
S-8520/8521 Series
VOUT
VOUT
VSS
VSS
+
+
C
C
OUT
OUT
3