https://devzone.nordicsemi.com/f/nordic-q-a/18007/ldo-vs-dcdc-nrf51822Hi, I am using simple ADC peripheral to read internal battery voltage(standalone). I am using two custom nRF51822 boards. One of the nRF51822 board is made by nRF51822 Schematic with Internal LDO (Module’s Default) and other one nRF51822 Schematicen-USTelligent Community 13Wed, 30 Nov 2016 08:39:09 GMThttps://devzone.nordicsemi.com/thread/69413?ContentTypeID=1Wed, 30 Nov 2016 08:39:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c6e1a72a-7840-4eeb-bccd-a77a0818c0cdbjorn-spockeli<p>The only difference between the nRF51822 reference circuit with the internal LDO setup and the reference circuit with the DC/DC converter setup is that the DC/DC setup includes L5(15nH), L4 (10uH) and C12(1uF), which are components required by the DCDC.</p> <p>The DC/DC setup can run both from the internal LDO and the DC/DC, in fact it will use the internal LDO by default. The DCDC must be explicitly turned on in code by calling the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s130.api.v2.0.1/group___n_r_f___s_o_c___f_u_n_c_t_i_o_n_s.html#ga84bd6a0e8f55a7aa85a5ec608edd61fe">sd_power_dcdc_mode_set()</a> function, i.e.</p> <pre><code>sd_power_dcdc_mode_set (NRF_POWER_DCDC_ENABLE) </code></pre> <p>You code should run just fine on both the board based on the LDO setup and the one based on the DCDC setup.</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/69412?ContentTypeID=1Mon, 28 Nov 2016 06:53:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fa8850b0-bba0-4258-999e-79fd1a386a8ckvrb<p>I am attaching code here</p> <p><a href="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/8662.main.c">main.c</a></p><div style="clear:both;"></div>