S-1206B18-M3T1G Seiko Instruments, S-1206B18-M3T1G Datasheet - Page 12

• Manufacturer Part Number: S-1206B18-M3T1G
• Description: IC, LDO VOLT REG, 1.8V, 250mA, 3-SOT-23
• Manufacturer: Seiko Instruments

Specifications of S-1206B18-M3T1G

• Primary Input Voltage: 6.5V
• Output Voltage Fixed: 1.8V
• Dropout Voltage Vdo: 150mV
• No. Of Pins: 3
• Output Current: 250mA
• Operating Temperature Range: -40°C To +85°C
• Output Voltage: 5.2V
• Polarity: Positive
• Input Voltage Max: 7 V
• Output Type: Fixed
• Dropout Voltage (max): 3 V at 100 mA
• Load Regulation: 20 mV
• Voltage Regulation Accuracy: 1 %
• Maximum Power Dissipation: 430 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOT-23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12
ULTRA LOW CURRENT CONSUMPTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1206 Series
Operation
1. Basic Operation
2. Output Transistor
Figure 11 shows the block diagram of the S-1206 Series.
The error amplifier compares the reference voltage (V
feedback resistors R
output voltage free of any fluctuations of input voltage and temperature.
The S-1206 Series uses a low-on-resistance P-channel MOS FET as the output transistor.
Be sure that V
from the VOUT pin through a parasitic diode to the VIN pin.
OUT
current supply
*1. Parasitic diode
does not exceed V
VIN
VSS
Constant
s
and R
Reference voltage
V
f
. It supplies the output transistor with the gate voltage necessary to ensure a certain
ref
circuit
IN
+ 0.3 V to prevent the IC from being damaged due to inverse current flowing
Error amplifier
Seiko Instruments Inc.
−
+
Figure 11
ref
) with V
fb
, which is the output voltage resistance-divided by
V
R
R
fb
f
s
*1
VOUT
Rev.1.1
_00