LTC3450 Datasheet, PDF (2/12 Pages) Linear Technology – Triple Output Power Supply for Small TFT-LCD Displays

LTC3450
ABSOLUTE AXI U RATI GS
(Note 1) (Referred to GND)
V_IN, SW.......................................................... – 0.3 to 7V
SHDN, MODE ................................................. – 0.3 to 7V
V_OUT .............................................................................. – 0.3 to 7V
V_NEG ........................................................................ –17V to 0.3V
Operating Temperature Range
LTC3450E (Note 4) ............................. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
C3⁺ 1
C3^– 2
V_NEG 3
MODE 4
16 15 14 13
12 V2X
11 C1⁺
17
10 C1^–
9 GND
5678
UD PACKAGE
16-LEAD (3mm × 3mm) PLASTIC QFN
EXPOSED PAD IS V_NEG (PIN 17)
MUST BE SOLDERED TO PCB
T_JMAX = 125°C, θ_JA = 68°C/W
ORDER PART
NUMBER
LTC3450EUD
UD PART MARKING
LAAC
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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
Input Voltage Range
V_IN Quiescent Supply Current
V_OUT Quiescent Supply Current
V_IN Quiescent Supply Current
V_OUT Quiescent Supply Current
V_IN Quiescent Current
5V Boost Regulator
V_OUT Output Voltage
V_OUT Efficiency
V_OUT Maximum Output Current
Switch Current Limit
Switching Frequency—Boost
Switching Frequency—Boost
Charge Pumps
V2X Output Voltage
CONDITIONS
MODE = V_IN
MODE = V_IN
MODE = GND
MODE = GND
SHDN = GND
Load on V5X = 5mA
Load on V5V = 5mA, (Note 2)
L = 47µH, (Note 2)
MODE = V_IN
MODE = GND
Load on V2X = 100µA
MIN TYP MAX UNITS
q 1.5
4.6
V
75
130
µA
80
µA
30
50
µA
13
µA
0.01
2
µA
5.049 5.100 5.151
V
90
%
11
mA
90
120
mA
550
kHz
15.62
kHz
q 9.792 10.1 10.608
V
3450f
2