MCP1804T-3302I/DB Microchip Technology, MCP1804T-3302I/DB Datasheet - Page 23

• Manufacturer Part Number: MCP1804T-3302I/DB
• Description: IC REG LDO 3.3V 150MA SOT223-3
• Manufacturer: Microchip Technology

Specifications of MCP1804T-3302I/DB

• Package / Case: SOT-223 (3 leads + Tab), SC-73, TO-261
• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: Up to 28V
• Voltage - Dropout (typical): 1.3V @ 100mA
• Number Of Regulators: 1
• Current - Output: 150mA (Min)
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Input Voltage Max: 28 V
• Output Voltage: 1.8 V
• Output Voltage Tolerance: +/- 2 %
• Dropout Voltage (max): 710 V
• Output Current: 150 mA
• Line Regulation: 0.05 %/V
• Load Regulation: 275 mV
• Maximum Power Dissipation: 300 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: MCP1804T-3302I/DBTR

6.0
6.1
The MCP1804 is most commonly used as a voltage
regulator. It’s low quiescent current and wide input volt-
age make it ideal for Li-Ion and 12V battery-powered
applications.
FIGURE 6-1:
6.1.1
6.2
6.2.1
The internal power dissipation of the MCP1804 is a
function of input voltage, output voltage and output
current. The power dissipation, as a result of the
quiescent current draw, is so low, it is insignificant
(50.0 µA x V
calculate the internal power dissipation of the LDO.
EQUATION 6-1:
© 2009 Microchip Technology Inc.
Where:
Package Type
Input Voltage Range
V
V
I
OUT
I
50 mA
IN
OUT
OUT
P
V
LDO
V
OUT(MIN)
V
1.8V
maximum
IN(MAX)
OUT
typical
P
APPLICATION CIRCUITS AND
ISSUES
Typical Application
Power Calculations
LDO
=
APPLICATION INPUT CONDITIONS
POWER DISSIPATION
IN
(
V
). The following equation can be used to
= LDO Pass device internal power
= Maximum input voltage
= LDO minimum output voltage
IN MAX )
C
1 µF Ceramic
(
dissipation
OUT
SHDN
V
OUT
Typical Application Circuit.
)
–
= SOT-23
= 3.8V to 4.2V
= 4.6V
= 1.8V
= 50 mA maximum
V
OUT MIN
(
GND
NC
V
IN
)
) I
×
OUT MAX )
C
1 µF
4.2V
Ceramic
V
(
IN
IN
)
The maximum continuous operating temperature
specified for the MCP1804 is +85
internal junction temperature of the MCP1804, the total
internal power dissipation is multiplied by the thermal
resistance from junction to ambient (Rθ
resistance from junction to ambient for the SOT-23 pin
package is estimated at 256
EQUATION 6-2:
The maximum power dissipation capability for a
package can be calculated given the junction-
to-ambient thermal resistance and the maximum
ambient temperature for the application. The following
equation can be used to determine the package
maximum internal power dissipation.
EQUATION 6-3:
EQUATION 6-4:
EQUATION 6-5:
Where:
Where:
Where:
Where:
T
P
P
T
T
T
T
T
J(MAX)
P
TOTAL
AMAX
D(MAX)
Rq
A(MAX)
J(RISE)
J(RISE)
J(MAX)
TOTAL
Rq
Rq
JA
T
T
T
JA
JA
J MAX
A
P
J
(
D MAX
=
=
=
=
T
(
=
=
=
=
=
=
=
=
=
=
J RISE
(
)
Maximum continuous junction
temperature.
Total device power dissipation.
Thermal resistance from junction to
ambient.
Maximum ambient temperature.
T
Maximum device power dissipation.
Maximum continuous junction
temperature.
Maximum ambient temperature.
Thermal resistance from junction to
ambient.
Rise in device junction temperature over
the ambient temperature.
Maximum device power dissipation.
Thermal resistance from junction to
ambient.
Junction Temperature.
Rise in device junction temperature over
the ambient temperature.
Ambient temperature.
=
)
J
=
)
P
=
TOTAL
=
(
---------------------------------------------------
T
T
J RISE
P
J MAX
(
(
D MAX
(
×
°
C/W.
R
R
)
)
MCP1804
+
θ
θ
–
)
JA
JA
×
T
T
A
A MAX
R
+
°
(
C
θ
T
DS22200B-page 23
JA
.
AMAX
To estimate the
JA
)
)
). The thermal