LM3311SQ National Semiconductor Corporation, LM3311SQ Datasheet - Page 8

• Manufacturer Part Number: LM3311SQ
• Description: Step-up Pwm Dc/dc Converter With Integrated Ldo, Op-amp, And Gate Pulse Modulation Switch
• Manufacturer: National Semiconductor Corporation

www.national.com
Gate Pulse Modulation
R
R
R
I
V
Low Dropout Linear Regulator (LDO)
LV
V
I
%V
%V
I
V
V
CE
ADJ
QL
CE(TH)
ADJ
DO
ADJ(LOW)
VGH-VGHM
VGHM-RE
VGHM(OFF)
Electrical Characteristics
Specifications in standard type face are for T
Range ( T
Note 1: Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended
to be functional, but device parameter specifications may not be guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: Under normal operation the V
the pin, however the V
Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, T
θ
dissipation at any ambient temperature is calculated using: P
excessive die temperature, and the regulator will go into thermal shutdown.
Note 4: The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin per JEDEC standard JESD22-A114.
Note 5: All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are 100%
production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used
to calculate Average Outgoing Quality Level (AOQL).
Note 6: Typical numbers are at 25°C and represent the most likely norm.
Note 7: Duty cycle affects current limit due to ramp generator.
Note 8: Current limit at 0% duty cycle. See TYPICAL PERFORMANCE section for Switch Current Limit vs. V
Note 9: Bias current flows into pin.
Note 10: Input signal is overdriven to force the output to swing rail to rail.
Symbol
Symbol
IN
JA
ADJ
ADJ
, and the ambient temperature, T
/ΔV
/ΔI
L
IN
J
= −40°C to +125°C). Unless otherwise specified V
VGH to VGHM Resistance
VGHM to RE Resistance
VGH Resistance
CE Current
CE Voltage Threshold
Input Voltage Range
ADJ Pin Voltage
ADJ Pin Current (Note 9)
ADJ Voltage Line Regulation
LDO
LV
Dropout Voltage
V
Threshold
ADJ
IN
OUT
Quiescent Current
Short Circuit Disable
C
and CE pins should never have a voltage directly applied to them.
Load Regulation
Parameter
Parameter
A
. See the Electrical Characteristics table for the thermal resistance of various layouts. The maximum allowable power
C
and CE pins may go to voltages above this value. The maximum rating is for the possibility of a voltage being applied to
20mA Current, VGH = 30V
20mA Current, VGH = VGHM
= 30V
VDPM is Low, VGHM = 2V
CE = 0V
LV
LV
2.8V, no load
I
3.3V, LDO
Device enabled
Device shut down
350mA load, LDO
LV
OUT
J
= 25°C and those with boldface type apply over the full Operating Temperature
IN
IN
IN
= 10mA to 300mA, LV
= 3V and 7V
= 3V to 7V, LDO
= 3.3V
D
(MAX) = (T
Conditions
Conditions
OUT
= 2.8V
J(MAX)
OUT
IN
8
= LV
− T
OUT
= 2.8V
A
)/θ
IN
=
JA
IN
=2.5V.
. Exceeding the maximum allowable power dissipation will cause
=
(Note 5)
(Note 5)
1.197
-11.6
1.16
Min
Min
-2.6
218
2.5
40
J
(MAX), the junction-to-ambient thermal resistance,
IN
(Note 6)
(Note 6)
1.263
0.032
2.931
1.22
0.85
Typ
Typ
290
409
1.2
14
27
57
28
(Note 5)
(Note 5)
1.289
Max
28.5
1.30
Max
10.5
380
425
674
1.7
1.4
0.9
55
71
7
8
Units
Units
mV
kΩ
µA
nA
µA
Ω
%
%
V
V
V
V