Figure 3-19. Controller Dc Block Diagram - Motorola APX 1000 Detailed Service Manual

3-26
3.2.2 DC Distribution
SW_B+ supply comes from a pass FET (Q6501) that is powered by UNSW_B+ (battery voltage).
The FET is activated once the power switch is in its on position. SW_B+ supplies the power for the
entire controller. SW_B+ supplies MAKO and the external regulators. MAKO and the external
regulators then regulate the voltage to the desired level.
OMAP's core is supplied by VCC_SW_1.4 (U6507). 1.85 LDO supplies OMAP's IO, FLASH, CPLD,
DDR, and MACE. See Table 3-2 for DC supplies and sources.
SW_B+
MAKO
SW_B+
SW_B+

Figure 3-19. Controller DC Block Diagram

(See Figure
Ext SW
TPS62050
SW1
3.6V
800mA Max
SW2
2.23V
400mA Max
1.875V
LDO2
120mA Max
1.55V
LDO3
150mA Max
2.775V
LDO4
100mA Max
2.775V
LDO6
50mA Max
2.775V
LDO7
100mA Max
3.0V
LDO9
50mA Max
3.3V
LDO10
70mA Max
SW5
5.0V
VBUS1
500mA Max
5.0V
VBUS2
500mA Max
5.0V
LDO8
25mA Max
1.5A Max
SW5_5.4V
External SW
TPS62110
External Switcher Replaced
Switcher MAKO's Switchr 5
External SW
TPS62050
Theory of Operation
3-19.)
V_SW_3.6
Ext LDO
TPS73601
V_EXT_1.85
Ext LDO
LP38693
EXSW_1.4V
800mA Max
: Controller