AS1371-BTDT-105 austriamicrosystems, AS1371-BTDT-105 Datasheet - Page 8

• Manufacturer Part Number: AS1371-BTDT-105
• Description: IC REG LDO 400MA 1.05V 6-TDFN
• Manufacturer: austriamicrosystems

Specifications of AS1371-BTDT-105

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.05V
• Voltage - Input: 1.2 ~ 3.6 V
• 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
• Voltage - Dropout (typical): -
• Current - Limit (min): -

AS1371
Datasheet - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
The AS1371 is a low-dropout, low-quiescent-current linear regulator intended for LDO regulator applications where output current load
requirements range from no load to 400mA. All devices come with fixed output voltage from 0.6V to 3.3V.
The AS1371 also features a Power-OK output to indicate when the output is within 10% (max) of final value, and also an Enable pin. Shutdown
current for the whole regulator is typically 10nA. The device features integrated short-circuit and over current protection. Under-Voltage lockout
prevents erratic operation when the input voltage is slowly decaying (e.g. in a battery powered application). Thermal Protection shuts down the
device when die temperature reaches 150°C. This is a useful protection when the device is under sustained short circuit conditions.
As illustrated in
internal voltage divider, current limiter, thermal sensor and shutdown logic.
The bandgap reference is connected to the inverting input of the error amplifier. The error amplifier compares this reference with the feedback
voltage and amplifies the difference. If the feedback voltage is lower than the reference voltage, the P-channel MOSFET gate is pulled lower,
allowing more current to pass to the output, and increases the output voltage. If the feedback voltage is too high, the pass-transistor gate is
pulled up, allowing less current to pass to the output. The output voltage feeds back through an internal resistor voltage divider connected to pin
OUT.
Figure 13. AS1371 - Block Diagram
Output Voltages
Standard products are factory-set with output voltages from 0.6V to 3.3V. A two-digit suffix of the part number identifies the nominal output
Ordering Information on page
For more information contact:
www.austriamicrosystems.com/LDOs/AS1371
GND
EN
IN
Figure
13, the devices comprise voltage reference, error amplifier, P-channel MOSFET pass transistor, Power-OK detect logic,
Current Reference
Bandgap Voltage
Protection
Overload
Thermal
14). Non-standard devices are available.
http://www.austriamicrosystems.com/contact
&
Control Logic
Shutdown/
Power-On
Trimmable
Reference
Voltage
Revision 1.05
-
Amplifie
+
Power-OK
Compare
Error
Logic
r
(see Ordering Information on page
NMOS
AS1371
POK
OUT
SENSE
8 - 15
(see
14).