LTC3524

3

3524f

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.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Switch Current Limit

100

150

mA

Charge Pumps

V2x Output Voltage

Load on V2x = 250μA

10

V

Output Impedance V2x

Flying Capacitors = 0.1μF

250

Ω

V2x Maximum Operating Voltage

(Note 3)

12

V

VH Output Voltage (Quadrupler)

Load = 250μA (FBH = 1V)

20

V

Output Impedance (2X + Quadrupler)

Flying Capacitors = 0.1μF

1200

Ω

FBH Regulation Voltage

●

1.15

1.225

1.30

V

VH Maximum Operating Voltage

(Note 3)

20

VN Output Voltage

–9.7

V

FBN Regulation Voltage

●

0.94

1

1.06

V

Output Impedance VN (2X + VN)

Flying Capacitor = 0.1μF

650

Ω

VN Minimum Operating Voltage

(Note 3)

–20

V

Switching Frequency Charge Pumps

94

KHz

V2x to VN Delay

(Note 4)

2

ms

VN to VH Delay

(Note 4)

2

ms

LED Boost

LED1,2 Current Accuracy

18

20

22

mA

SW2 Maximum Current Limit

500

700

mA

350

mV

Logic Inputs

ELED1, ELED2 , ELCD Thresholds

●

0.4

0.8

1.2

V

Note 3: Specification is guaranteed by design and not 100% tested in

production.