MCP1727-3302E/SN Microchip Technology, MCP1727-3302E/SN Datasheet - Page 18

• Manufacturer Part Number: MCP1727-3302E/SN
• Description: IC REG LDO 1.5A 3.3V 8SOIC
• Manufacturer: Microchip Technology

Specifications of MCP1727-3302E/SN

• Package / Case: 8-SOIC (3.9mm Width)
• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: Up to 6V
• Voltage - Dropout (typical): 0.33V @ 1.5A
• Number Of Regulators: 1
• Current - Output: 1.5A (Min)
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 6 V
• Output Voltage: 3.3 V
• Output Type: Fixed
• Dropout Voltage (max): 0.55 V at 1.5 A
• Output Current: 1.5 A
• Line Regulation: 0.05 % / V
• Load Regulation: 0.5 %
• Voltage Regulation Accuracy: 2 %
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Primary Input Voltage: 3.85V
• Output Voltage Fixed: 3.3V
• Dropout Voltage Vdo: 330mV
• No. Of Pins: 8
• Voltage Regulator Case Style: SOIC
• Operating Temperature Range: -40°C To
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP1726
5.0
5.1
The MCP1726 is used for applications that require high
LDO output current and a power good output.
FIGURE 5-1:
5.1.1
5.2
5.2.1
The internal power dissipation within the MCP1726 is a
function of input voltage, output voltage, output current
and quiescent current. The following equation can be
used to calculate the internal power dissipation for the
LDO.
EQUATION 5-1:
DS21936C-page 18
Off
Input Voltage Range = 3.3V ± 10%
V
V
IN
P
On
V
OUT(MIN)
= 3.3V
LDO
IN(MAX)
C
10 µF
P
Package Type = 3x3DFN8
V
1
APPLICATION CIRCUITS/
ISSUES
Typical Application
V
Power Calculations
LDO
V
IN
=
IN
OUT
APPLICATION CONDITIONS
POWER DISSIPATION
maximum = 3.63V
(
minimum = 2.97V
V
= LDO Pass device internal power
= Maximum input voltage
= LDO minimum output voltage
IN MAX )
1
2
3
4
typical = 2.5V
MCP1726-2.5
(
dissipation
V
V
SHDN
GND PWRGD
I
OUT
IN
IN
)
Typical Application Circuit.
= 1.0A maximum
C
–
DELAY
V
V
V
OUT
OUT
OUT MIN
8
7
6
5
(
)
) I
1000 pF
C
10kΩ
×
3
V
OUT
R
OUT MAX )
1
= 2.5V @ 1A
PWRGD
(
C
10 µF
)
2
In addition to the LDO pass element power dissipation,
there is power dissipation within the MCP1726 as a
result of quiescent or ground current. The power dissi-
pation as a result of the ground current can be
calculated using the following equation:
EQUATION 5-2:
The total power dissipated within the MCP1726 is the
sum of the power dissipated in the LDO pass device
and the P(I
tion, the typical I
Operating at a maximum of 3.63V results in a power
dissipation of 0.51 milli-Watts. For most applications,
this is small compared to the LDO pass device power
dissipation and can be neglected.
The maximum continuous operating junction tempera-
ture specified for the MCP1726 is +125
the internal junction temperature of the MCP1726, the
total internal power dissipation is multiplied by the ther-
mal resistance from junction to ambient (Rθ
device. The thermal resistance from junction to ambi-
ent for the 3x3DFN package is estimated at 41
EQUATION 5-3:
V
P
IN(MAX)
T
P
I(GND)
T
J(MAX)
TOTAL
AMAX
Rθ
I
VIN
JA
T
GND
J MAX
= Power dissipation due to the
= Maximum input voltage
= Current flowing in the V
(
= Maximum continuous junction
= Total device power dissipation
= Thermal resistance from junction-to-
= Maximum ambient temperature
P
quiescent current of the LDO
LDO output current (LDO quiescent
current)
) term. Because of the CMOS construc-
I GND
temperature
ambient
(
)
GND
=
)
P
TOTAL
=
for the MCP1726 is 140 µA.
© 2007 Microchip Technology Inc.
V
IN MAX
(
×
Rθ
)
JA
×
+
I
VIN
T
IN
°
AMAX
C
pin with no
.
To estimate
JA
°
) of the
C/W.