AS1367-BTDT-45 austriamicrosystems, AS1367-BTDT-45 Datasheet - Page 11

• Manufacturer Part Number: AS1367-BTDT-45
• Description: IC REG LDO 150MA 4.5V 8-TDFN
• Manufacturer: austriamicrosystems

Specifications of AS1367-BTDT-45

• Package / Case: 8-UFDFN Exposed Pad
• Mounting Type: Surface Mount
• Current - Output: 150mA (Min)
• Voltage - Output: 4.5V
• Voltage - Input: Up to 5.5V
• Operating Temperature: -40°C ~ 85°C
• Regulator Topology: Positive Fixed
• Voltage - Dropout (typical): 0.11V @ 150mA
• Number Of Regulators: 1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -

AS1367
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 the maximum over the entire device temperature
range, use a 3.3µF (min) ceramic output capacitor with an ESR <0.2Ω. Use large output capacitor values (10µF max)
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. Z5U
Power Supply Rejection Ratio
The AS1367 are designed to deliver low dropout voltages and low quiescent currents. Power-supply rejection is
typically 60dB at 10kHz. To improve power supply-noise rejection and transient response, increase the values of the
input and output bypass capacitors.
The
see the Power-Supply Rejection Ratio vs. Frequency graph in the
Dropout Voltage
For standard products with output voltage greater than the minimum V
differential (dropout voltage) 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 it is calculated by:
Where:
Figure 17. Application Diagrams
www.austriamicrosystems.com
Input
2V to 5.5V
C
1
µ
270kΩ
IN
R
Electrical Characteristics on page 4
F
ADJ
and Y5V capacitors may be required to ensure stability at temperatures below T
capacitors, a 3.3µF capacitor should be sufficient at all operating temperatures.
R
I
OUT
DS(ON)
ON /
OFF
is the output current.
is the drain-to-source on-resistance.
External Voltage Level Detection
(Input Monitoring)
IN
IN
EN
GND
AS1367
POK
OUT
BYP
SET
V
DROPOUT
show also the device line- and load-transient responses. For further details
R
100kΩ
PU
1.2V to 5.0V
=
C
10nF
Output
BYP
V
C
3.3µF
IN
Revision 1.02
OUT
–
V
OUT
Input
2V to 5.5V
C
1µF
IN
=
R
Figure 9 on page
ON /
OFF
DS ON
(
Internal Voltage Level Detection
)
IN
×
(1.2V), the minimum input-output voltage
I
OUT
(Output Monitoring)
IN
IN
EN
GND
AS1367
7.
AMB
OUT
POK
BYP
SET
= -10ºC. With X7R or X5R
R
100kΩ
PU
1.2V to 5.0V
C
10nF
Output
BYP
(EQ 3)
C
3.3µF
11 - 14
OUT