CC3200_15 Datasheet, PDF (51/71 Pages) Texas Instruments – CC3200 SimpleLink™ Wi-Fi® and Internet-of-Things Solution, a Single-Chip Wireless MCU

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CC3200
SWAS032F – JULY 2013 – REVISED FEBRUARY 2015
5.6 Power-Management Subsystem
The CC3200 power-management subsystem contains DC-DC converters to accommodate the differing
voltage or current requirements of the system.
• Digital DC-DC
– Input: VBAT wide voltage (2.1 to 3.6 V) or preregulated 1.85 V
• ANA1 DC-DC
– Input: VBAT wide voltage (2.1 to 3.6 V)
– In preregulated 1.85-V mode, the ANA1 DC-DC converter is bypassed.
• PA DC-DC
– Input: VBAT wide voltage (2.1 to 3.6 V)
– In preregulated 1.85-V mode, the PA DC-DC converter is bypassed.
In preregulated 1.85-V mode, the ANA1 DC-DC and PA DC-DC converters are bypassed. The CC3200
device is a single-chip WLAN radio solution used on an embedded system with a wide-voltage supply
range. The internal power management, including DC-DC converters and LDOs, generates all of the
voltages required for the device to operate from a wide variety of input sources. For maximum flexibility,
the device can operate in the modes described in the following sections.
5.6.1 VBAT Wide-Voltage Connection
In the wide-voltage battery connection, the device is powered directly by the battery or preregulated 3.3-V
supply. All other voltages required to operate the device are generated internally by the DC-DC
converters. This scheme is the most common mode for the device as it supports wide-voltage operation
from 2.1 to 3.6 V (for electrical connections, see Section 6.1.1, Typical Application – CC3200 Wide-
Voltage Mode).
5.6.2 Preregulated 1.85 V
The preregulated 1.85-V mode of operation applies an external regulated 1.85 V directly at the pins 10,
25, 33, 36, 37, 39, 44, 48, and 54 of the device. The VBAT and the VIO are also connected to the 1.85-V
supply. This mode provides the lowest BOM count version in which inductors used for PA DC-DC and
ANA1 DC-DC (2.2 and 1 µH) and a capacitor (22 µF) can be avoided. For electrical connections, see
Section 6.1.2, Typical Application – CC3200 Preregulated 1.85-V Mode.
In the preregulated 1.85-V mode, the regulator providing the 1.85 V must have the following
characteristics:
• Load current capacity ≥900 mA.
• Line and load regulation with <2% ripple with 500 mA step current and settling time of <4 µs with the
load step.
• The regulator must be placed very close to the CC3200 device so that the IR drop to the device is very
low.
5.7 Low-Power Operating Mode
From a power-management perspective, the CC3200 device comprises the following two independent
subsystems:
• Cortex-M4 application processor subsystem
• Networking subsystem
Each subsystem operates in one of several power states.
The Cortex-M4 application processor runs the user application loaded from an external serial flash. The
networking subsystem runs preprogrammed TCP/IP and Wi-Fi data link layer functions.
The user program controls the power state of the application processor subsystem and can be in one of
the five modes described in Table 5-2.
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