ZLED7022 Datasheet

© 2016 Integrated Device Technology, Inc.

12

April 20, 2016

Select a pump capacitor value in the range of 0.47µF to 2.2µF depending on output current requirements; 1µF is recommended for

most applications. When designing the circuit to operate at high levels of output current, choose a higher value of capacitance; low

output currents do not require a large pump capacitor. As with Cin and Cout, low ESR ceramic capacitors are recommended for

the pump capacitor. See section 4.2.1 for a discussion of low ESR capacitors.

4.2.3.

LEDs

The ZLED7022’s low dropout current sinks are capable of driving most types of LEDs with forward voltages as high as 4.7V at full

current with a Vcc input supply of 2.8V to 5.5V. High-current LEDs can be driven by using any of the D5:D0 pins in parallel.

The brightness of the LEDs being driven will match despite any variations in the forward voltage (VF) of the individual LEDs

because the [D5:D0] output current sinks are matched with negligible voltage dependence (see section 1.3 for specifications).

4.3.

Unused LED Driver Pins

LED driver pin D0 must always be used. If any of the LED driver pins [D1:D5] are unused, disable the pin(s) by connecting them to

ground to avoid noise coupling.

5

ESD Protection

From each I/O or VCC pin to GND, there is an ESD protection of

≥±3000V. Between the I/O pins, there is an ESD protection of

≥±1000V according the Human Body Model (HBM). The ESD test follows the H

uman Body Model with 1.5 kΩ/100 pF based on

MIL 883-G, Method 3015.7.

6

Pin Configuration and Package

Figure 6.1

Pin Configuration ZLED7022 – Top View

1

2

3

7

8

9

GND

D5

D4

VCC

VOUT

D0