LTC3450 Datasheet, PDF (3/12 Pages) Linear Technology – Triple Output Power Supply for Small TFT-LCD Displays

LTC3450
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V, V_OUT = 5.2V unless otherwise noted.
PARAMETER
V3X Output Voltage
V2X Efficiency
V3X Efficiency
Output Impedance V2X, V3X
V_NEG Output Voltage
V_NEG Efficiency
Output Impedance V_NEG
Switching Frequency Charge Pumps
Switching Frequency Charge Pumps
V_NEG to V3X Delay
Logic Inputs
SHDN Pin Threshold
MODE Pin Threshold
CONDITIONS
Load on V3X = 100µA
Load on V2X = 100µA, (Note 2)
Load on V3X = 100µA, (Note 2)
Flying Capacitors = 0.1µF
Load on V_NEG = 100µA, V_INV = V2X
Load on V_NEG = 100µA (Note 2)
Flying Capacitor = 0.1µF
MODE = V_IN
MODE = GND
(Note 3)
MIN
q 14.688
q –10.608
3
TYP
15.2
90
80
1
– 10.1
80
1
62.5
3.75
4
MAX
15.912
– 9.792
10
UNITS
V
%
%
kΩ
V
%
kΩ
kHz
kHz
ms
q 0.4
0.77
1.2
V
1.6
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Specification is guaranteed by design and not 100% tested in
production.
Note 3: Measured from point at which V_NEG crosses –5V to point at which
C2^– starts switching.
Note 4: The LTC3450E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the – 40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
3450f
3