LM3661TL-1.25 NSC [National Semiconductor], LM3661TL-1.25 Datasheet - Page 5

• Manufacturer Part Number: LM3661TL-1.25
• Description: 450mA Subminiature, Micropower Step-Down DC-DC Converter for Ultra Low-Voltage Circuits
• Manufacturer: NSC [National Semiconductor]

V
V
I
I
I
R
R
I
I
I
SHDN
Q,PWM
Q,LIN
lim_-1.25
lim_-1.35/-1.4
lim_LIN
V
FB, PWM
OVP
DSON(P)
DSON(N)
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
Specifications with standard typeface are for T
Range (T
C
Supply Voltage
PGND to SGND
EN, SYNC/MODE, VSEL to
FB, ISEL, SW
Symbol
FB, LINEAR
OUT
PVIN, VDD to SGND
SGND
= 22 µF.
A
= T
Feedback Voltage, PWM Mode
V
Feedback Voltage, Linear Mode
V
OVP Comparator Hysteresis
Voltage (Note 5)
OVP Trip point
Shutdown Supply Current
DC Bias Current into V
(V
DC Bias Current into V
Pin-pin Resistance for PFET
Pin-pin Resistance for NFET
Switch Peak Current Limit
Switch Peak Current Limit
Max Current in Linear Mode
IN
IN
J
OUT
= 2.7V to 5.5V, I
= −30˚C to +85˚C). Unless otherwise specified, PV
= 2.7V to 5.5V
set to 1.35V)
Parameter
OUT
DD
DD
= 1mA
(Note 2)
−0.2V to +0.2V
−0.2V to (VDD
−0.2V to +6V
−0.2V to +6V
J
(Note 1)
LM3661TL-1.25, V
LM3661TL-1.25, V
LM3661TL-1.35, V
LM3661TL-1.35, V
LM3661TL-1.40, V
LM3661TL-1.40, V
LM3661TL-1.25, V
LM3661TL-1.25, V
LM3661TL-1.35, V
LM3661TL-1.35, V
LM3661TL-1.4, V
LM3661TL-1.4, V
SYNC/MODE = V
V
SYNC/MODE = V
V
EN = 0V
PWM mode, no switching
(SYNC/MODE = V
No-Load, Linear mode
(SYNC/MODE = 0V)
PWM mode
I
PWM mode
I
PWM mode
I
PWM mode
I
SYNC/MODE = 0V, FB = 0V
V
= 25˚C, and those in bold face type apply over the full Operating Temperature
SEL
SEL
SEL
SEL
IN
IN
IN
+0.2V)
= 2.7V to 5.5V
= 3.6V
=V
=V
= 2.7V to 5.5V
= 0, V
= 0, V
IN
IN
, V
, V
IN
IN
IN
IN
= 2.7V to 4.5V
= 2.7V to 4.5V
Remarks
= 2.7V to 4.5V
= 2.7V to 4.5V
5
SEL
SEL
IN
IN
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
DD
Storage Temperature Range
Lead Temperature
(Soldering, 10 sec.)
Operating Ratings
Input Voltage Range
Operating Temperature
Junction Temperature (Note 3)
Minimum ESD Rating
(Human Body Model, C = 100 pF,
Thermal properties
Thermal Resistance (θ
IN
= 0
= V
, V
R = 1.5 kΩ)
= V
= V
= V
= 0
= V
= 0
= 0
= 0
= V
= 0
= V
FB
IN
IN
IN
DD
IN
IN
IN
=2V)
= EN = SYNC/MODE = V
1.019
1.213
1.019
1.310
1.019
1.358
0.998
1.188
0.998
1.283
0.998
TBD
TBD
1.33
Min
473
565
50
35
JA
)
1.05
1.25
1.05
1.35
1.05
1.40
1.05
1.25
1.05
1.35
1.05
TBD
Typ
425
250
180
454
518
615
1.4
0.5
64
70
29
60
SEL
= 3.6V, I
−30˚C to +125˚C
1.082
1.288
1.082
1.391
1.082
1.442
1.103
1.313
1.103
1.418
1.103
TBD
TBD
Max
1.47
−45˚C to 150˚C
550
650
90
90
40
90
5
-30˚C to 85˚C
2.7V to 5.5V
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SEL
170˚C/W
= 0V,
260˚C
±
Units
2 kV
mΩ
mΩ
mV
mV
mA
mA
mA
mA
mA
µA
µA
µA
V
V
V
V
V
V
V
V
V
V
V
V