LM3538

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SNVS674A – JUNE 2011 – REVISED MAY 2013

Typical Performance Characteristics (continued)

Unless otherwise specified: VIN_A,B,C = 3.6V, CIN_A = COUT = 1.0µF, CIN_B = 0.1µF, CIN_C = 4.7µF, C1 = C2= 1.0µF, CLDOx=

1.0µF, TA = 25°C.

Quiescent Current

Quiescent Current

vs

vs

Input Voltage

Input Voltage 3/2× Gain

1× Gain

3/2× Gain

Figure 14.

Figure 15.

Charge Pump 1.5x Efficiency

LED Current Matching Distribution.

vs

6 Drivers on Group A, Output Set to 25 mA.(1)

Load Current

Figure 16.

Figure 17.

(1)

For the two groups of current sinks on a part (Group A and Group B), the following are determined: the maximum sink current in the

group (MAX), the minimum sink current in the group (MIN), and the average sink current of the group (AVG). For each group, two

matching numbers are calculated: (MAX-AVG)/AVG and (AVG-MIN)/AVG. The largest number of the two (worst case) is considered the

matching figure for the group. The matching figure for a given part is considered to be the highest matching figure of the two groups.

The typical specification provided is the most likely norm of the matching figure for all parts.

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