AS1364-BTDT-33-1k ams, AS1364-BTDT-33-1k Datasheet - Page 9

• Manufacturer Part Number: AS1364-BTDT-33-1k
• Description: Low Dropout Controllers - LDO
• Manufacturer: ams

Specifications of AS1364-BTDT-33-1k

• Rohs: yes
• Input Voltage Max: 5.5 V
• Output Voltage: 3.3 V
• Output Current: 1 A
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TDFN-8
• Input Voltage Min: 2 V
• Minimum Operating Temperature: - 40 C

AS1364
Datasheet - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
The AS1364 output voltage is factory-trimmed or is adjustable from +1.2V to +5V, and is guaranteed to supply 1A of output current. The device
consists of a +1.20V internal reference, error amplifier, MOSFET driver, P-channel pass transistor, internal feedback voltage-divider and a
comparator
Figure 16. AS1364 - Block Diagram
Figure 16
control element. A stable voltage reference (1.2V REF in
between the two voltages (reference and sample) creates an output from the error amplifier that drives the series control element to reduce the
difference to a minimum. The error amplifier incorporates additional buffering to drive the relatively large gate capacitance of the series pass P-
channel MOSFET, when additional drive current is required under transient conditions. Input supply variations are absorbed by the series
element, and output voltage variations with loading are absorbed by the low output impedance of the regulator.
When in shutdown, a 5k discharge path is connected between the output terminal and ground.
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2.0V to 5.5V
Logic Supply Voltage
V
On
Off
IN
shows the block diagram of the AS1364. It identifies the basics of a series linear regulator employing a P-Channel MOSFET as the
To Controller
(see Figure
V
OUT
C
4.7µF
IN
100k
R
16).
POK

POK
EN
IN
IN
4
3
2
1
Shutdown
Logic
AS1364
Amplifier
Figure
Error
94%
MOSFET
VREF
w/I
Driver
16) is compared with an attenuated sample of the output voltage. Any difference
LIM
+
–
+
–
Revision 1.8
+
–
Reference
1.20V
Thermal
100mV
Sensor
+
–
5k

+
–
6
OUT
7
SET/BYP
8
GND
5
OUT
R
R
1
2
1.2V to 5.0V
C
4.7µF
OUT
V
OUT
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