when DCDC is enabled, the advertising current becomes larger than the current under disabled DCDC

[Ming]

adv interval : 1s 

adv data: 31byte

tx power: 0dBm

MCU: nRF52832

The power consumption is shown in the figure below,when I don't enable DCDC.

what may be the reason caused this phenomenon.and data of 0x40000578 is 01

    timers_init();
    NRF_POWER->DCDCEN = 1;
    app_fds_init();
    ble_peripheral();
    power_management_init();    
    ble_stack_init();
//		err_code = sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);
//    APP_ERROR_CHECK(err_code);  
    gap_params_init();
    gatt_init();
    peer_manager_init();
    services_init();
    beacon_adv_init();
    conn_params_init();

    app_macaddr_manage(NULL,READ_ADDR);
    err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, NULL, TX_POWER_LEVEL);
    APP_ERROR_CHECK(err_code);

    // Start execution.
    NRF_LOG_INFO("************************\n");
    NRF_LOG_INFO("uart and beacon started.\n");
    NRF_LOG_INFO("************************\n");
//		delete_bonds(erase_bonds);

    broadcast_start();

[Ming]

sdk:15.3