Description
The 5L1503 is a series of small form factor programmable clock
generators intended for low-power, consumer, battery powered
applications, wearable and smart devices.
The device is a 1 PLL + DCO architecture design with an external
fundamental crystal or clock input. The device allows up to 3
unique frequency outputs. The 5L1503 has built-in unique
features such as Proactive Power Saving (PPS) and an extreme
low power DCO to support system date/time keeping clock at
32.768kHz. Dynamic Frequency Control (DFC) supports
dynamically changing between four different PLL frequencies via
external requests with controlled frequency changes, reducing
frequency overshoot and undershoot (ORT). The 5L1503S device
can also support a spread clock output for EMI reduction. For a
description of terms and their functions, see Glossary of Features.
An internal OTP memory allows the user to store up to four
independent configurations that can be loaded on power-up
without programming.
The 5L1503 supports three LVCMOS type outputs with
VDDO1.8V, as well as various amplitude clocks. A low-power
32.768kHz clock is supported with only less than 1μA current
consumption for system RTC reference clock needs.

Typical Applications
▪ SmartDevice
▪ Handheld
▪ Wearable applications
▪ Portable Consumer applications

Features
▪ Proactive Power Saving (PPS) features save power during the
end device power-down mode
▪ Dynamic Frequency Control (DFC) feature allows programming
up to 4 difference frequencies that switch dynamically
▪ Multiple output clock amplitude (1V, 1.1V, 1.2V and 1.8V) to
support low swing clock requirement
▪ Dedicated 32kHz output with 6 clock amplitude options
(5L1503L)
▪ Configurable through OTP programming
▪ Spread spectrum clock support (5L1503S)
▪ 1.8V operating supply voltage
▪ 2 × 2 mm 10-VFQFPN package