controlling a DC motor with nordic ble

Question

1- I am looking for Bluetooth Chip to control a DC Motor.
2- This Chip need to be small since it will be fitted on a small narrow PCB (10mm width x 110mm long PCB).
3- Chip need to be very very efficient since it will be operating from 7.2v (6 x 1.2v AAA rechargeable batteries) or 9v (6 x 1.5v AAA regular alkaline batteries) and should last long of at list 1 year
4- Motor will operate from 3v to 12v, uses 55mah and will be run to go forward and reverse multiple times of the day for about total of 120 seconds usage daily (2 minutes daily average). 
 for my above requirement which ble product you would recommend me? also and how should i go about development because at the end i need to mass produce the product. 
 thanking in advance.

Roger Clark · Accepted Answer

IMHO. Whatever Bluetooth Low Energy (BLE) MCU you use is not going to make much difference to your battery life as 99% of the capacity of the batteries is going to be used driving the motor. 
 Also, I don't know of any BLE MCU which will operate from 7.2V or 9V.
Most devices require 3.3V (the nRF52840 which is not available until Q4 2017 will run from 5V but even that is not high enough for your supply) 
 Either you need to use a LDO regulator or you need to tap off your battery pack to supply 2.4v (2 x 1.2V) or 3V (2 * 1.5V) 
 Supply noise is likely to be an issue which you will also need to pay attention to.