RT9198-18GJ5 Richtek USA Inc, RT9198-18GJ5 Datasheet - Page 10

• Manufacturer Part Number: RT9198-18GJ5
• Description: IC REG LDO 1.8V 300MA TSOT23-5
• Manufacturer: Richtek USA Inc

Specifications of RT9198-18GJ5

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.8V
• Voltage - Input: 2.5 V ~ 5.5 V
• Voltage - Dropout (typical): 0.22V @ 300mA
• Number Of Regulators: 1
• Current - Output: 300mA (Max)
• Current - Limit (min): 360mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5 Thin, TSOT-23-5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RT9198/A
For recommended operating conditions specification of
RT9198/A, where T
temperature of the die (125°C) and T
ambient temperature. The junction to ambient thermal
resistance (θ
23-5/SOT-23-3/SOT-23-5 package is 250°C/W, SC-70-5
and SC-82 package is 333°C/W and WDFN-6L 2x2
package is 165°C/W on standard JEDEC 51-3 thermal
test board. The maximum power dissipation at T
can be calculated by following formula :
P
TSOT-23-5/SOT-23-3/SOT-23-5)
P
P
The maximum power dissipation depends on operating
ambient temperature for fixed T
resistance θ
derating curves allows the designer to see the effect of
rising ambient temperature on the maximum power
allowed.
www.richtek.com
10
D(MAX)
D(MAX)
D(MAX)
700
600
500
400
300
200
100
0
= (125°C − 25°C)/333 = 300mW (SC-70-5/SC-82)
= (125°C − 25°C) / 165 = 606mW (WDFN-6L 2x2)
= (125°C − 25°C)/250 = 400mW (TSOT-23-3/
Figure 2. Derating Curve for Packages
0
WDFN-6L 2x2
SC 70-5
SC-82
JA
JA
15
. For RT9198/A packages, the Figure 2. of
is layout dependent) for TSOT-23-3/TSOT-
30
Ambient Temperature (°C)
J(MAX)
45
60
is the maximum junction
SOT-23-3/SOT-23-5
TSOT-23-3/TSOT-23-5
75
J(MAX)
A
90
is the maximum
and thermal
105
A
120
= 25°C
135
DS9198/A-13 June 2009