LM3350 National Semiconductor, LM3350 Datasheet - Page 3

• Manufacturer Part Number: LM3350
• Description: Switched Capacitor Voltage Converter
• Manufacturer: National Semiconductor

Symbol
I
Z
f
V
I
P
Q2
SW
Enable
Electrical Characteristics
2/3 Step-Down Voltage Converter
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device is in-
tended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see Electrical Characteristics. The guar-
anteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test
conditions.
Note 2: For operation at elevated temperatures, LM3350 must be derated based on package thermal resistance of
Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 kW resistor into each pin.
Note 4: Typical numbers are at 25˚C and represent the most likely parametric norm.
Note 5: Limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control
(SQC) methods. The limits are used to calculate National’s Averaging Outgoing Quality Level (AOQL).
Note 6: The internal oscillator runs at 1.6 MHz, the output switches operate at one half of the oscillator frequency, f
Specifications in standard type face are for T
range. Unless otherwise specified, V
out
Typical Performance Characteristics
V
Enable
out
vs I
load
Quiescent Current
Output Source
Impedance
Switching
Frequency
Enable Threshold
Voltage
Leakage Current
Power Efficiency
(Step-Up)
Parameter
DS100002-4
Normal Mode, I
pin V
I
(Note 6)
Current into ENABLE pin; ENABLE =
5V and all other pins at ground
load
high
= 50 mA
high
= 5V, V
P vs I
j
= 25˚C, and those with boldface type apply over full operating temperature
Conditions
Enable
Ioad
load
= 0A; Current into
= 5V, I
(Step-Up)
(Continued)
load
3
= 50 mA.
DS100002-6
Typ (Note 4)
0.025
800
2.5
1.8
1.7
90
Output Source Impedance vs
Temperature (Step-Up)
OSC
ja
and T
Limits (Note 5)
= 2f
SW
j
max, T
1100
.
500
3.3
1.0
2.5
3
1
j
= T
A
+
ja
P
D
.
www.national.com
DS100002-9
kHz(Max)
mA(Max)
kHz(Min)
µA(Max)
V(Max)
V(Min)
Units
kHz
mA
(Max)
µA
%
V