AS1372-BWLT-12 austriamicrosystems, AS1372-BWLT-12 Datasheet - Page 9

• Manufacturer Part Number: AS1372-BWLT-12
• Description: IC REG LDO 350MA 1.2V 5WLCSP
• Manufacturer: austriamicrosystems

Specifications of AS1372-BWLT-12

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.2V
• Voltage - Input: Up to 4.5V
• Voltage - Dropout (typical): 0.135V @ 350mA
• Number Of Regulators: 1
• Current - Output: 350mA (Min)
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 5-UFBGA, WLCSP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Other names: AS1372-BWLT-12TR

AS1372
Datasheet - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
The AS1372 is a low-dropout, low-quiescent-current linear regulator intended for LDO regulator applications where
output current load requirements range from no load to 350mA. All devices come with fixed output voltage from 0.5V to
2.2V.
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 N-channel MOSFET gate is pulled higher, 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 down, allowing less current to pass
to the output. The output voltage feeds back through an internal resistor voltage divider connected to pin OUT.
Figure 19. AS1372 - Block Diagram
Output Voltages
Standard products are factory-set with output voltages from 0.5V to 2.2V. A two-digit suffix of the part number identifies
the nominal output
For more information contact:
www.austriamicrosystems.com/LDOs/AS1372
(see Ordering Information on page
VBIAS
GND
VIN
EN
Figure
Current Reference
Bandgap Voltage
(see Ordering Information on page
Protection
Overload
Thermal
19, the devices comprise voltage reference, error amplifier, N-channel MOSFET pass transistor,
&
http://www.austriamicrosystems.com/contact
13).
Control Logic
Shutdown/
Power-On
Trimmable
Reference
Voltage
13). Non-standard devices are available.
Revision 1.01
+
-
Amplifie
Error
r
AS1372
NMOS
OUT
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