LM3671MF-1.25 National Semiconductor, LM3671MF-1.25 Datasheet - Page 7

• Manufacturer Part Number: LM3671MF-1.25
• Description: DC/DC CONVERTER, 1.25V, SMD, 3671
• Manufacturer: National Semiconductor

Specifications of LM3671MF-1.25

• Primary Input Voltage: 2.25V
• No. Of Outputs: 1
• Output Voltage: 1.25V
• Output Current: 600mA
• Voltage Regulator Case Style: SOT-23
• No. Of Pins: 5
• Operating Temperature Range: -25°C To +85°C
• Svhc: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Electrical Characteristics
type apply over the full operating ambient temperature range (−30˚C ≤ T
apply to the LM3671MF/TL with V
Note 6: Junction to ambient thermal resistance is highly application and board layout dependent. In applications where high power dissipation exists, special care
must be given to thermal dissipation issues in board design. Specified value of 130 ˚C/W for SOT23-5 is based on a 4 layer, 4" x 3", 2/1/1/2 oz. Cu board as per
JEDEC standards is used.
Note 7: Refer to datasheet curves for closed loop data and its variation with regards to supply voltage and temperature. Electrical Characteristic table reflects open
loop data (FB=0V and current drawn from SW pin ramped up until cycle by cycle current limit is activated). Closed loop current limit is the peak inductor current
measured in the application circuit by increasing output current until output voltage drops by 10%.
Note 8: Min and Max limits are guaranteed by design, test or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm.
Note 9: The parameters in the electrical characteristic table are tested at V
to datasheet curves.
Note 10: The input voltage range recommended for ideal applications performance for the specified output voltages is given below:
V
V
Note 11: Feedback voltage specification for ADJ include the tolerances of the resistor divider network. ADJ version is configured to 1.5V output.
Dissipation Rating Table
IN
IN
= 2.7V to 5.5V for 1.0V
= (V
85˚C/W (4 layer board) 5-bump Micro SMD
OUT
+ 1V) to 5.5V for 1.8V ≤ V
130˚C/W (4 layer board) SOT23-5
<
V
OUT
θ
JA
<
OUT
1.8V
IN
≤ 3.3V
= EN = 3.6V (Continued)
(Notes 2, 8, 9) Limits in standard typeface are for T
Power Rating
IN
= 3.6V unless otherwise specified. For performance over the input voltage range refer
T
1179mW
770mW
A
7
≤ 25˚C
A
≤ +85˚C). Unless otherwise noted, specifications
Power Rating
T
500mW
765mW
A
= 60˚C
J
= 25˚C. Limits in boldface
Power Rating
T
310mW
470mW
A
= 85˚C
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