FIGURE 2. 6-Bump Thin Micro SMD Package, Large Bump
NS Package Number TLA06LCA
Note: The actual physical placement of the package marking will vary from part to part. The package marking “X” designates the
date code; “V” is an NSC internal code for die traceability. Both will vary in production.
Pin Descriptions
Pin Micro SMD
A1
Name
EN
Description
Enable pin. The device is in shutdown mode when voltage to this pin is <0.4V and enabled
when >1.2V.
Do not leave this pin floating.
Mode Pin: Mode = 1, Forced PWM
Mode = 0, ECO
Do not leave this pin floating.
Feedback analog input. Connect directly to the output filter capacitor. (Figure 1)
Power supply input. Connect to the input filter capacitor. (Figure 1)
Switching node connection to the internal PFET switch and NFET synchronous rectifier.
Ground pin.
B1
Mode
C1
A2
B2
C2
FB
VIN
SW
GND
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2
LM3691
Ordering Information
Voltage Option V
0.75
0.85*
0.9*
1.0*
1.1*
1.2
1.3*
1.375*
1.5
1.6*
1.8
Order Number 6–bump Micro
SMD
LM3691TL-0.75
LM3691TLX–0.75
LM3691TL-0.85
LM3691TLX–0.85
LM3691TL-0.9
LM3691TLX–0.9
LM3691TL-1.0
LM3691TLX–1.0
LM3691TL-1.1
LM3691TLX–1.1
LM3691TL–1.2
LM3691TLX–1.2
LM3691TL–1.3
LM3691TLX–1.3
LM3691TL–1.375
LM3691TLX–1.375
LM3691TL–1.5
LM3691TLX–1.5
LM3691TL–1.6
LM3691TLX–1.6
LM3691TL–1.8
LM3691TLX–1.8
Package Marking
V
V
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
X
X
TBD
TBD
TBD
TBD
Y
Y
TBD
TBD
Z
Z
Supplied As
250 units, Tape-and-Reel
3000 units, Tape-and-Reel
250 units, Tape-and-Reel
3000 units, Tape-and-Reel
250 units, Tape-and-Reel
3000 units, Tape-and-Reel
250 units, Tape-and-Reel
3000 units, Tape-and-Reel
250 units, Tape-and-Reel
3000 units, Tape-and-Reel
250 units, Tape-and-Reel
3000 units, Tape-and-Reel
250 units, Tape-and-Reel
3000 units, Tape-and-Reel
250 units, Tape-and-Reel
3000 units, Tape-and-Reel
250 units, Tape-and-Reel
3000 units, Tape-and-Reel
250 units, Tape-and-Reel
3000 units, Tape-and-Reel
250 units, Tape-and-Reel
3000 units, Tape-and-Reel
* If any of the voltage options other than the released voltages are required, please contact the National Semiconductor Sales Office/Distributors for availability.
3
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LM3691
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
If Military/Aerospace specified devices are required, please
contact the National Semiconductor Sales Office/Distributors
for availability and specifications.
V
IN
Pin to GND
EN, MODE pin to GND
FB, SW pin
Junction Temperature (T
J-MAX
)
Storage Temperature Range
Continuous Power Dissipation
(Note 3)
Maximum Lead Temperature
(Soldering, 10 sec.)
ESD Rating (Note 4)
Human Body Model
Machine Model
−0.2V to 6.0V
−0.2V to 6.0V
(GND−0.2V) to
(V
IN
+ 0.2V) w/ 6.0V max
+150°C
−65°C to +150°C
Internally Limited
260°C
Operating Ratings
(Notes 1, 2)
Input Voltage Range
2.3V to 5.5V
Recommended Load Current
0 mA to 1000 mA
Junction Temperature (T
J
) Range
−40°C to +125°C
Ambient Temperature (T
A
) Range (Note −40°C to +85°C
5)
Thermal Properties
Junction-to-Ambient Thermal
Resistance (θ
JA
) (Note 6)
(micro SMD)
85°C/W
2 kV
200V
(Notes 2, 7, 8) Limits in standard typeface are for T
A
= 25°C. Limits in
boldface
type
apply over the operating ambient temperature range (−30°C
≤
T
A
= T
J
≤
+85°C). Unless otherwise noted, specifications apply to
the LM3691 open loop Typical Application Circuit with V
IN
= EN = 3.6V.
Symbol
V
FB
I
SHDN
I
Q_ECO
I
Q_PWM
R
DSON (P)
R
DSON (N)
I
LIM
V
IH
V
IL
I
EN,MODE
F
SW
V
ON
Parameter
Feedback Voltage
Shutdown Supply Current
ECO Mode I
q
PWM Mode I
q
Pin-Pin Resistance for PFET
Pin-Pin Resistance for NFET
Switch Peak Current Limit
Logic High Input
Logic Low Input
Input Current
Switching Frequency
UVLO threshold
PWM Mode
V
IN
rising
V
IN
falling
3.6
0.01
4
2.2
2.1
Condition
PWM Mode. No load V
OUT
= 1.1V to 1.8V
PWM Mode. No load V
OUT
= 0.75V to 1.0V
EN = 0V
ECO Mode
PWM Mode
V
IN
= V
GS
= 3.6V, I
O
= 200 mA
V
IN
= V
GS
= 3.6V, I
O
= −200 mA
Open loop
1250
1.2
0.4
1
4.4
Min
-1
-10
0.03
64
490
160
115
1500
Typ
Max
+1
+10
1
80
600
250
180
1700
Units
%
mV
µA
µA
µA
mΩ
mΩ
mA
V
V
µA
MHz
V
V
Electrical Characteristics
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation
of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions,
see the Electrical Characteristics tables.
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
J
= 150°C (typ.) and disengages at T
J
= 130°C (typ.).
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
A-MAX
) is dependent on the maximum operating junction temperature (T
J-MAX
), the maximum power dissipation of the device in
the application (P
D-MAX
) and the junction to ambient thermal resistance of the package (θ
JA
) in the application, as given by the following equation: T
A-MAX
= T
J-MAX
− (θ
JA
x P
D-MAX
). Due to the pulsed nature of testing the part, the temp in the Electrical Characteristic table is specified as T
A
= T
J
.
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.
Note 7:
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 8:
The parameters in the electrical characteristic table are tested under open loop conditions at V
IN
= 3.6V unless otherwise specified. For performance
over the input voltage range and closed loop condition, refer to the datasheet curves.
