Figure 3-18. V_Sw_1.4 Switched Power Supply - Motorola APX 3000 Detailed Service Manual

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Table of Contents

3.2.2.1.2 External Regulators: V_SW_1.4, V_SW_3.60

The controller board contains two TPS62050 regulators in order to regulate voltages of 1.4V and

3.6V. The TPS62050 is a synchronous step-down adjustable regulator. The switching regulator is

capable of sourcing 800mA. Its output can be adjusted by using a voltage divider tied to the

feedback pin. The regulators are powered from SW_B+.

V_SW_1.4 regulator.

Table 3-3. MAKO's LDO and Supplies (Continued)

Figure 3-18.

illustrates the supporting circuitry for the TPS62050.

VCC_SW1.4_VIN

Figure 3-18. V_SW_1.4 Switched Power Supply

Figure 3-18.

Theory of Operation

is the schematic for the

: Controller