LM2687MMX National Semiconductor, LM2687MMX Datasheet - Page 3

• Manufacturer Part Number: LM2687MMX
• Manufacturer: National Semiconductor
• Type: Invertingr

Specifications of LM2687MMX

• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Package Type: MSOP
• Pin Count: 8
• Mounting: Surface Mount
• Output Voltage: -5.2 to -1.5V
• Output Current: 10mA
• Lead Free Status / RoHS Status: Not Compliant

Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
Limits with standard typeface apply for T
otherwise specified V
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device
beyond its rated operating conditions.
Note 2: OUT may be shorted to GND for one second without damage. However, shorting OUT to V
temperatures above T
Note 3: The maximum power dissipation must be de-rated at elevated temperatures and is limited by T
temperature) and θ
Note 4: Rating is for the human body model, a 100pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Note 5: The output switches operate at one half the oscillator frequency, f
Note 6: All capacitors are 1µF.
Note 7: Current drawn from V
Note 8: In the test circuit, capacitors C
increase output voltage ripple, and reduce efficiency.
Note 9: The feedback resistors R1 and R2 are 200kΩ resistors.
Symbol
η
T
Supply Voltage (V
to OUT)
SD
V
Current
V
(Note 2)
Continuous Power Dissipation (T
25˚C) (Note 3)
R
POWER
V
F
START
NEG
OUT
V
V
I
V
V
NEG
OUT
I
SD
SW
Q
FB
IH
IL
R
and V
Short-Circuit Duration to GND
Supply Current
Shutdown Supply Current
Switching Frequency
(Note 5)
Power Efficiency at V
Start Up time
Output Resistance to V
Output Voltage Ripple
(Note 8)
Feedback Pin Reference
Voltage
Adjustable Output Voltage
Load Regulation
Line Regulation
Shutdown Pin Input Voltage
High
Shutdown Pin Input Voltage
Low
OUT
JA
Continuous Output
A
(junction-to-ambient thermal resistance). The maximum power dissipation at any temperature is:
IN
= 85˚C, OUT must not be shorted to GND or V
PDiss
Parameter
to GND or GND
IN
= 3.6V, C
NEG
MAX
pin decreases power efficiency and will increase output voltage ripple.
= (T
1
and C
NEG
A
1
JMAX
NEG
= C
=
2
are 1µF, C
2
— T
J
= 1µF, C
Open Circuit, No Load
2.7V ≤ V
V
I
I
(Note 6)
(Note 7)
I
I
I
5.5V ≥ V
5.5V ≥ V
0mA
0 to 10mA, V
5.5V ≥ V
5.5V ≥ V
5.5V ≥ V
(GND − 0.3V) to
= 25˚C, and limits in boldface type apply over the full temperature range. Unless
L
L
L
L
L
IN
= 3.6mA
= 10mA
=2.5mA, V
= 10mA, V
= 2.5mA (Note 9)
A
)/θ
= 3.6V
3
(V
= 10µF, 0.30Ω maximum ESR capacitors. Capacitors with higher ESR will increase output resistance,
(Note 1)
JA
IN
3
IN
IN
IN
IN
IN
IN
600mW
up to the value listed in the Absolute Maximum Ratings.
+ 0.3V)
= 10µF.
+ 5.8V
1 sec.
Conditions
10mA
≤.5.5V
≥ 2.7V, 2.5mA ≥ I
≥ 3.0V, 10mA ≥ I
≥ 2.7V, I
≥ 2.7V
≥ 2.7V
OUT
OUT
OUT
IN
or device may be damaged.
OSC
= −2.7V
= −3.8V
= − 2.4V
L
= 2f
3
= 2.5mA
SW
T
θ
Operating Input Voltage Range
Operating Output Current Range
Operating Ambient
Temp. Range
Operating Junction Temp. Range
Storage Temperature
Lead Temp. (Soldering, 10 sec.)
ESD Rating (Note 4)
.
JA
JMAX
L
L
(Note 3)
≥
(Note 3)
− (V
− (V
IN
may damage the device and must be avoided. Also, for
−1.25
IN
IN
Min
2.2
50
60
JMAX
−0.3V)
−1.2V)
(maximum junction temperature), T
−1.20
0.05
Typ
500
110
105
120
94
91
30
1
2
5
1
−1.15
Max
950
180
170
600
−65˚C to 150˚C
−40˚C to 110˚C
0.5
1
−40˚C to 85˚C
0mA to 10mA
2.7V to 5.5V
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250˚C/W
A
150˚C
300˚C
(ambient
mV/mA
Units
mV/V
kHz
mV
2kV
µA
µA
µs
%
Ω
V
V
V
V