DC-DC Converter

Address: 0xA000A814
Reset Value: 0x0098877D

The DC-DC buck converter supplies power to all RF blocks, digital logic blocks, and memories.

表 42 DC-DC converter specifications
Parameter	Symbol	Min.	Typ.	Max.	Unit	Remarks
Output Voltage	V_DCDC	0.9	1.05	1.35	V	Programmable
Load Current	I_LOAD			45	mA
Startup Time	T_STARTUP		100		μs
Voltage Ripples	V_RIPP		10		mV	Peak-to-peak ripple voltage
Conversion Efficiency	η_DCDC		85%			VBATL=3.3 V, I_LOAD=10 mA

Note:

Voltage Ripples is obtained based on L_ext = 2.2 μH + 9.1 nH and C_ext = 2.2 μF

RF_REG_4

表 43 RF_REG_4 Register
Bits	Field Name	RW	Reset	Description
23	EN_BLEED	RW	0x1	Enables Bleed Current to improve stability
22	LDO_BYPASS	RW	0x0	Enables Bypass mode.
21	CTRL_GATE_ON	RW	0x0	Value: 0x0: Power device is half. 0x1: Doubles the power device for larger current capability.
20:16	VREF_CTRL_4_0	RW	0x18	The dcdc_vref value to PMU.

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