AS1371-BTDT-25 austriamicrosystems, AS1371-BTDT-25 Datasheet - Page 11

• Manufacturer Part Number: AS1371-BTDT-25
• Description: IC REG LDO 400MA 2.5V 6-TDFN
• Manufacturer: austriamicrosystems

Specifications of AS1371-BTDT-25

• Regulator Topology: Positive Fixed
• Voltage - Output: 2.5V
• Voltage - Input: Up to 3.6V
• Voltage - Dropout (typical): 0.08V @ 400mA
• Number Of Regulators: 1
• Current - Output: 400mA (Min)
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 6-UFDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -

AS1371
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
9 Application Information
Capacitor Selection and Regulator Stability
Ceramic capacitors are highly recommended as they offer distinct advantages over their tantalum and aluminum electrolytic components. For
stable operation with load currents up to 400mA over the entire device temperature range, use a 1µF (min) ceramic output capacitor with an
ESR <0.2Ω. Use large output capacitor values (e.g. 10µF) to reduce noise and improve load transient-response, stability and power-supply
rejection.
Note: Some ceramic capacitors exhibit large capacitance and ESR variations with variations in temperature.
Power Supply Rejection Ratio
The AS1371 is designed to deliver low dropout voltages and low quiescent currents. Power-supply rejection is typically 50dB at 10kHz. To
improve power supply-noise rejection and transient response, increase the values of the input and output bypass capacitors, which are shown in
Figure
The
Dropout Voltage
For standard products with output voltage greater than the minimum V
determines the lowest usable supply voltage. This determines the useful end-of-life battery voltage in battery-powered systems. The dropout
voltage is a function of the P-MOSFET drain-to-source on-resistance multiplied by the load current, and is calculated by:
Where:
Figure 14. Application Diagrams
www.austriamicrosystems.com/LDOs/AS1371
Section 6 Electrical Characteristics on page 4
14.
Input
1.2V to 3.6V
R
I
OUT
DS(ON)
R
R
is the output current.
ON /
OFF
1
2
C
1
µ
IN
F
is the drain-to-source on -resistance.
External Voltage Level Detection
IN
EN
GND
(Input Monitoring)
AS1371
SENSE
POK
OUT
V
DROPOUT
show also the device line- and load-transient responses.
R
100kΩ
PU
0.6V to 3.3V
=
Output
V
C
1µF
IN
OUT
–
Revision 1.05
V
IN
OUT
(1.2V), the minimum input-output voltage differential (dropout voltage)
=
R
Input
1.2V to 3.6V
ON /
OFF
DS ON
(
)
×
C
1
µ
I
Internal Voltage Level Detection
IN
OUT
F
(Output Monitoring)
IN
GND
EN
AS1371
SENSE
OUT
POK
R
100kΩ
PU
0.6V to 3.3V
Output
C
1µF
OUT
(EQ 4)
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