MIC5205-3.3BM5 TR Micrel Inc, MIC5205-3.3BM5 TR Datasheet - Page 9
![IC REG LDO 150MA 3.3V 1% SOT23-5](/photos/6/57/65771/576-sot-23-5_sml.jpg)
MIC5205-3.3BM5 TR
Manufacturer Part Number
MIC5205-3.3BM5 TR
Description
IC REG LDO 150MA 3.3V 1% SOT23-5
Manufacturer
Micrel Inc
Datasheet
1.MIC5205-3.0YM5_TR.pdf
(10 pages)
Specifications of MIC5205-3.3BM5 TR
Regulator Topology
Positive Fixed
Voltage - Output
3.3V
Voltage - Input
Up to 16V
Voltage - Dropout (typical)
0.165V @ 150mA
Number Of Regulators
1
Current - Output
150mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-23-5, SC-74A, SOT-25
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Limit (min)
-
Other names
MIC5205-3.3BM5TR
Therefore, a 3.3V application at 150mA of output current
can accept a maximum input voltage of 6.2V in a SOT-
23-5 package. For a full discussion of heat sinking and
thermal effects on voltage regulators, refer to the
Regulator Thermals section of Micrel’s Designing with
Low-Dropout Voltage Regulators handbook.
Fixed Regulator Applications
Figure 1 includes a 470pF capacitor for low-noise
operation and shows EN (pin 3) connected to IN (pin 1)
for an application where enable/shutdown is not
required. C
Figure 2 is an example of a low-noise configuration
where C
Adjustable Regulator Applications
The MIC5205BM5 can be adjusted to a specific output
voltage by using two external resistors (Figure 3). The
Micrel
February 2006
Figure 1. Ultra-Low-Noise Fixed Voltage Application
V
IN(max)
Figure 2. Low-Noise Fixed Voltage Application
BYP
OUT
= 6.23V
is not required. C
= 2.2µF minimum.
OUT
= 1µF minimum.
9
resistors set the output voltage based on the following
equation:
This equation is correct due to the configuration of the
bandgap reference. The bandgap voltage is relative to
the output, as seen in the block diagram. Traditional
regulators normally have the reference voltage relative
to ground and have a different V
Resistor values are not critical because ADJ (adjust) has
a high input impedance, but for best results use resistors
of 470kΩ or less. A capacitor from ADJ to ground
provides greatly improved noise performance.
Adjustable Voltage Application
Figure 3 includes the optional 470pF noise bypass
capacitor from ADJ to GND to reduce output noise.
Dual-Supply Operation
When used in dual supply systems where the regulator
load is returned to a negative supply, the output voltage
must be diode clamped to ground.
V
OUT
=
1.242V
Figure 3. Ultra-Low-Noise
×
⎛
⎜
⎝
R2
R1
+
1
⎞
⎟
⎠
OUT
equation.
(408) 955-1690
M9999-020806
MIC5205