Functional Description

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The ZXLD1615 and ZXLD1601 are PFM inductive DC-DC boost converters. They are particularly suited to provide bias voltages for LCD and OLED displays. Up to 28V can be generated from an input voltage between 2.5 and 5.5V.

The switch is integrated on chip together with the peak current sense resistor. An output current of 10mA is available at 28V, with proportionally higher currents at lower voltages.

The output voltage is set by 2 external resistors connected to the feedback input. PWM control at the enable input can be used to adjust this voltage. An on chip filter enables flicker free control at PWM frequencies above 10kHz, or normal gated control below 1kHz.

Quiescent current is typically 60µA. At shutdown the maximum current is 100nA.

The ZXLD1615ET5 is packaged in a low profile TSOT23-5 package. Maximum package height is 1mm. The ZXLD1601 is packaged in a small footprint SC70-6 package.

The ZXLD1615ET5 is pin compatible with LT1615, TPS61040 and SP6690. In many applications the ZXLD1615 can replace these parts. Input voltage range is the main difference. Most other parameters are the same or very close.

Description

Vin (V)

Output voltage

Typical

quiescent

current (µA)

Shutdown

current (nA)

Efficiency

Switching frequency (kHz)

Package

ZXLD1615ET5	2.5 to	Up to 28V	60	100	80	600	TSOT23-5
ZXLD1615ET5	5.5	Up to 28V	60	100	80	600	TSOT23-5
	5.5

ZXLD1601H6	2.5 to	Up to 28V	60	100	80	600	SC70-6
ZXLD1601H6	5.5	Up to 28V	60	100	80	600	SC70-6
	5.5

Applications Information

The data sheets contain information about the operation of each converter and how the internal blocks function. The data sheets also contains additional applications information on:

•1cell Li-Ion to 3.3V SEPIC converter

•1cell Li-Ion to 5V SEPIC converter

•Triple output boost converter for LCD or OLED bias

•Selecting inductors, capacitors and diodes.