LTC3524_15 Datasheet, PDF (3/16 Pages) Linear Technology – Adjustable TFT Bias Supply with WLED Driver

LTC3524
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are T_A = 25°C. V_IN = 3.6V, V_OUT = 5.1V, T_A = 25°C, unless otherwise noted.
PARAMETER
Switch Current Limit
Charge Pumps
V2x Output Voltage
Output Impedance V2x
V2x Maximum Operating Voltage
VH Output Voltage (Quadrupler)
Output Impedance (2X + Quadrupler)
FBH Regulation Voltage
VH Maximum Operating Voltage
VN Output Voltage
FBN Regulation Voltage
Output Impedance VN (2X + VN)
VN Minimum Operating Voltage
Switching Frequency Charge Pumps
V2x to VN Delay
VN to VH Delay
LED Boost
LED1,2 Current Accuracy
SW2 Maximum Current Limit
SW2 V_CESAT
Logic Inputs
ELED1, ELED2 , ELCD Thresholds
CONDITIONS
MIN TYP MAX UNITS
100 150
mA
Load on V2x = 250μA
10
V
Flying Capacitors = 0.1μF
250
Ω
(Note 3)
12
V
Load = 250μA (FBH = 1V)
20
V
Flying Capacitors = 0.1μF
1200
Ω
● 1.15 1.225 1.30
V
(Note 3)
20
Load on VN = 250μA, VN_IN = 10.2V, External Schottkys
–9.7
V
● 0.94
1
1.06
V
Flying Capacitor = 0.1μF
650
Ω
(Note 3)
–20
V
94
KHz
(Note 4)
2
ms
(Note 4)
2
ms
R_PROG = 100k
I_SW = 350mA
18
20
22
mA
500 700
mA
350
mV
● 0.4
0.8
1.2
V
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3524E is guaranteed to meet specifications from 0°C to
85°C. Specifications over the –40°C to 85°C operating temperature range
are assured by design, characterization, and statistical process controls.
Note 3: Specification is guaranteed by design and not 100% tested in
production.
Note 4: Measured from point at which VN crosses –V_OUT to point at which
CH⁺ starts switching.
3524f
3