S-818A20AMC-BGA-T2 Seiko Instruments, S-818A20AMC-BGA-T2 Datasheet - Page 7
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S-818A20AMC-BGA-T2
Manufacturer Part Number
S-818A20AMC-BGA-T2
Description
Low Dropout (LDO) Regulators 2.0V 30uA 2.0%
Manufacturer
Seiko Instruments
Datasheet
1.S-818A33AUC-BGN-T2.pdf
(23 pages)
Specifications of S-818A20AMC-BGA-T2
Number Of Outputs
1
Polarity
Positive
Input Voltage Max
10 V
Output Voltage
2 V
Output Type
Fixed
Dropout Voltage (max)
0.87 V
Output Current
100 mA
Line Regulation
0.2 % / V
Load Regulation
50 mV
Voltage Regulation Accuracy
2 %
Maximum Power Dissipation
0.25 W
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOT-23-5
Minimum Operating Temperature
- 40 C
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
S-818A20AMC-BGA-T2G
Manufacturer:
SII/精工
Quantity:
20 000
Rev.1.2
Operation
1. Basic operation
2. Output transistor
3. Power Off Pin (ON/OFF Pin)
Figure 7 shows the block diagram of the S-818
Series.
The error amplifier compares a reference voltage
V
feedback resistors Rs and Rf. It supplies the output
transistor with the gate voltage, necessary to ensure
certain output voltage free of any fluctuations of input
voltage and temperature.
The S-818 Series uses a low on-resistance Pch MOS FET as the output transistor.
Be sure that V
inverse current flowing from V
This pin activates and inactivates the regulator.
When the ON/OFF pin is switched to the power off level, the operation of all internal circuit stops, the built-in
Pch MOSFET output transistor between V
The V
V
The structure of the ON/OFF pin is shown in Figure 8. Since the ON/OFF pin is neither pulled down nor pulled
up internally, do not keep it in the floating state. Current consumption increases if a voltage of 0.3 V to V
V is applied to the ON/OFF pin. When the power off pin is not used, connect it to the V
"A" and to the V
REF
SS
Product
pin.
with the part of the output voltage divided by the
type
OUT
A
A
B
B
Table 6 Power off pin function by product type
pin goes to the Vss level due to internal divided resistance of several M
OUT
SS
“H” : Power on
“H” : Power off
“L” : Power off
“L” : Power on
ON/OFF pin
pin for product type "B".
does not exceed V
OUT
pin to V
Operating
Operating
Internal
circuit
Stop
Stop
IN
Seiko Instruments Inc.
+0.3 V to prevent the voltage regulator from being broken due to
IN
IN
pin through the parasitic diode.
and V
LOW DROPOUT CMOS VOLTAGE REGULATOR
OUT
VOUT pin
Set value
V
V
Set value
voltage
SS
SS
pin is switched off, suppressing current consumption.
level
level
Current
source
VSS
VIN
Vref
Reference
voltage
circuit
Figure 7 Typical Circuit Block Diagram
consumption
Current
Iss1
Iss2
Iss2
Iss1
Error amplifier
*1 Parasitic diode
Figure 8 ON/OFF Pin
between V
IN
ON/OFF
Rf
Rs
pin for product type
S-818 Series
VSS
OUT
*1
VIN
pin and
IN
VOUT
-0.3
7