LM3671MF-1.6 National Semiconductor, LM3671MF-1.6 Datasheet - Page 7

• Manufacturer Part Number: LM3671MF-1.6
• Description: IC CONV DC/DC STEP-DOWN SOT23-5
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Step-Down (Buck)r

Specifications of LM3671MF-1.6

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.6V
• Current - Output: 600mA
• Frequency - Switching: 2MHz
• Voltage - Input: 2.7 ~ 5.5 V
• Operating Temperature: -30°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Power - Output: 770mW
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM3671MF-1.6; LM3671MF-1.6TR

Note 2: All voltages are with respect to the potential at the GND pin.
Note 3: Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T
T
Note 4: The Human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin. MIL-STD-883 3015.7
Note 5: In Applications where high power dissipation and/or poor package resistance is present, the maximum ambient temperature may have to be derated.
Maximum ambient temperature (T
the application (P
− (θ
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
refer to datasheet curves.
Note 10: The input voltage range recommended for ideal applications performance for the specified output voltages are given below:
V
V
V
where V
Note 11: ADJ version is configured to 1.5V output. For ADJ output version:
V
V
Note 12: Test condition: for V
Dissipation Rating Table
85°C/W (4 layer board) 5-bump
165°C/W (4 layer board) 6-pin
J
IN
IN
IN
IN
IN
= 130°C (typ.).
= 2.7V to 4.5V for 1.1V
= 2.7V to 5.5V for 1.5V
= (V
= 2.7V to 4.5V for 0.90V
= 2.7V to 5.5V for 1.1V
JA
130°C/W (4 layer board)
x P
OUT
DROPOUT
D-MAX
+ V
Micro SMD
SOT23-5
). Refer to Dissipation rating table for P
DROPOUT
= I
LLP
D-MAX
θ
JA
LOAD
) and the junction to ambient thermal resistance of the package (θ
) to 5.5V for 1.8V
*( R
≤
≤
≤
≤
DSON, PFET
V
V
V
OUT
V
OUT
OUT
OUT
OUT
less than 2.5V, V
A-MAX
< 1.5V
< 1.8V
< 3.3V
< 1.1V
+ R
) is dependent on the maximum operating junction temperature (T
≤
INDUCTOR
V
OUT
≤
Power Rating
)
IN
3.3V
= 3.6V; for V
D-MAX
T
1179mW
770mW
606mW
A
≤
25°C
values at different ambient temperatures.
OUT
greater than or equal to 2.5V, V
IN
= 3.6V unless otherwise specified. For performance over the input voltage range
7
JA
) in the application, as given by the following equation:T
Power Rating
T
500mW
765mW
394mW
A
= 60°C
IN
= V
J-MAX
OUT
), the maximum power dissipation of the device in
+ 1V.
J
= 150°C (typ.) and disengages at
Power Rating
T
310mW
470mW
242mW
A
= 85°C
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A-MAX
= T
J-MAX