TC56 Datasheet, PDF (3/16 Pages) Microchip Technology – 150mA, 10V LDO with Shutdown

2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1: PIN FUNCTION TABLE
Pin No.
(5-Pin SOT-23A)
1
2
3
4
5
Symbol
V_SS
V_IN
SHDN
(NC)
V_OUT
Ground.
Supply voltage input.
Shutdown input.
No connection.
Regulated voltage output.
Description
TC56
3.0 DETAILED DESCRIPTION
The TC56 is a precision, fixed output LDO. Unlike
bipolar regulations, the TC56 supply current does not
increase with load current.
3.1 Output Capacitor
A 10µF tantalum capacitor from V_OUT to ground is
recommended. The output capacitor should have an
effective series resistance greater than 0.1Ω and less
than 5.0Ω, and a resonant frequency above 1MHz. It is
recommended that a 4.7µF capacitor be connected
from V_IN to GND. When operating from sources other
than batteries, supply noise rejection and transient
response can be improved by increasing the value of
the input and output capacitors and employing passive
filtering techniques.
3.2 Shutdown Input
The TC56 enters a low power shutdown mode when
the shutdown control input (SHDN) is low. During
shutdown, the regulator is disabled and supply current
is reduced to 0.1µA (max). Normal operation is
restored when SHDN is driven high. If not required, the
SHDN input can be tied to V_IN.
 2002 Microchip Technology Inc.
DS21436B-page 3