TC2117-1.8VDBTR Microchip Technology, TC2117-1.8VDBTR Datasheet - Page 5

• Manufacturer Part Number: TC2117-1.8VDBTR
• Description: IC CMSO LDO 1.8V 800MA SOT223-3
• Manufacturer: Microchip Technology

Specifications of TC2117-1.8VDBTR

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.8V
• Voltage - Input: Up to 6V
• Voltage - Dropout (typical): 1.2V @ 800mA
• Number Of Regulators: 1
• Current - Output: 800mA (Min)
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-223 (3 leads + Tab), SC-73, TO-261
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 6 V
• Output Voltage: 1.8 V
• Output Type: Fixed
• Dropout Voltage (max): 30 mV
• Output Current: 800 mA
• Line Regulation: 0.001 %
• Load Regulation: 0 % / mA
• Voltage Regulation Accuracy: 0.5 %
• Maximum Operating Temperature: + 125 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: TC21171.8VDBTR

TABLE 3-2:
Equation 3-1 can be used in conjunction with
Equation 3-2 to ensure regulator thermal operation is
within limits. For example:
Find:
©
*Tab of device attached to topside copper.
Given:
2500 sq mm
1000 sq mm
125 sq mm
(Topside)*
2002 Microchip Technology Inc.
Copper
Area
1. Actual power dissipation
2. Maximum allowable dissipation
I
LOADMAX
V
V
OUT
2500 sq mm
2500 sq mm
2500 sq mm
T
(Backside)
T
IN
A
J
Copper
θ
MAX
MAX
MAX
MIN
THERMAL RESISTANCE
GUIDELINES FOR TC2117 IN
3-PIN DDPAK PACKAGE
Area
JA
= 5.0V ± 5%
= 3.3V ± 0.5%
= 400mA
= 125°C
= 55°C
= 59°C/W (SOT-223)
2500 sq mm
2500 sq mm
2500 sq mm
Board Area
Resistance
Thermal
25°C/W
27°C/W
35°C/W
(θ
JA
)
Actual power dissipation:
Maximum allowable power dissipation:
In this example, the TC2117 dissipates a maximum of
only 786mW; below the allowable limit of 1.186mW. In
a similar manner, Equation 3-1 and Equation 3-2 can
be used to calculate maximum current and/or input
voltage limits.
P
D
P
MAX
D
≈ (V
= [(5.0 x 1.05) – (3.3 x .995)] 400 x 10
= 786mW
=
=
=
IN
(T
(125 – 55)
1.186mW
MAX
J
MAX
– V
59
θ
– T
JA
OUT
A
MAX
MIN
)I
)
LOAD
TC2117
MAX
DS21665B-page 5
-3