AS1364-BTDT-15 austriamicrosystems, AS1364-BTDT-15 Datasheet - Page 11

• Manufacturer Part Number: AS1364-BTDT-15
• Description: IC REG LDO 1A 1.5V 8-TDFN
• Manufacturer: austriamicrosystems

Specifications of AS1364-BTDT-15

• Package / Case: 8-WDFN Exposed Pad
• Mounting Type: Surface Mount
• Current - Output: 1A (Min)
• Voltage - Output: 1.5V
• Voltage - Input: 2 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Regulator Topology: Positive Fixed
• Number Of Regulators: 1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Dropout (typical): -
• Current - Limit (min): -

AS1364
Data Sheet - 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
Input and output capacitors are required for stable operation of the AS1364 over the full temperature range and with
load currents up to 1A. Connect C
trace inductance.
Input Capacitor
For C
and may be smaller than 4.7µF if powered from regulated power supplies or low-impedance batteries. Larger input
capacitor values and lower ESR provide better noise rejection and line-transient response.
Output Capacitor
A 4.7µF low-ESR capacitor between OUT and ground is sufficient for C
ity and output noise. An output capacitors with an ESR of 0.5Ω or less is recommended to ensure stability and opti-
mum transient response. Reduced output noise and improve load-transient response, stability, and power-supply
rejection by using large output capacitors with low ESR.
Noise, PSRR, and Transient Response
AS1364 output noise is typically 10µV
This is suitably low for most applications
The AS1364 is designed to achieve extremly low dropout voltage and low quiescent current in battery-powered sys-
tems while still maintaining excellent noise performance, transient response, and PSRR. See the
for a plot of power-supply rejection ratio (PSRR) versus frequency.
When operating from very noisy sources, the factory preset variants a recommanded since they offer improved noise
performance over the adjustable variants.
www.austriamicrosystems.com
IN
, a 4.7µF capacitor between IN and ground is sufficient. C
IN
and C
RMS
(see Figure 10 on page
OUT
(100Hz to 100kHz) or 45µV
as close to the AS1364 as possible to minimize the impact of PC board
Revision 1.00
IN
7).
reduces the source impedance of the input supply
RMS
OUT
(10Hz to 1MHz) during normal operation.
. The output capacitor’s ESR affects stabil-
Figure 11 on page 7
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