Power Consumption

The software constantly adjusts the power supplies of the power management modules (such as DC-DC/LDO) according to different temperatures and system clock sources, so estimating the current consumption of an application can be challenging when the measurements cannot be performed directly on different test conditions. To facilitate the estimation, a set of current consumption scenarios are provided to show the typical current drawn from the VBATL supply.

Each scenario specifies a set of operations and conditions to apply to the given scenario. All scenarios are listed in "Electrical Specifications". The table below shows a set of common conditions used in all scenarios, unless otherwise stated in the description of a given scenario.

表 38 Common conditions
Condition	State	Remark
Supply	VBAT = 3.3 V
Temperature	25°C
CPU	WFI/WFE
Peripheral	All idle
Clock	System clock = 64 MHz@HFRC, low clock = 32.768 kHz@LFXO_32K
Flash clock	64 MHz
Core RAM	Full 96 KB retention	In active mode, full 96 KB RAM is powered; in sleep mode, full 96 KB RAM is retained.
Cache enabled	Yes, 4-way associative	Only applied when the CPU is running from Flash memory.
Bluetooth LE Stack	Disabled
32 MHz crystal	32 MHz	Only applied when the high-frequency crystal oscillator (HFXO_32M) is running, and HFXO_32M is used when the radio is running.
32 KHz crystal	32.768 KHz	Only applied when the low-frequency crystal oscillator (LFXO_32K) is running.
BOD/IO_LDO	BOD Enabled/IO_LDO On
VDDIO	3.3 V
DC-DC/CORE_LDO	DC-DC = 1.05 V / CORE_LDO = 0.90 V
Regulator	DC-DC
Flash	Standby mode	In active mode, Flash is powered on; in sleep mode, Flash is powered off.
Inductors
Compiler version	MDK-ARM Plus Version: 5.26.2.0
Compiler flag	--C99 -c --cpu Cortex-M4F.fp -D__MICROLIB --li -g -O3 --apcs=interwork --split_sections -D__UVISION_VERSION="526"

Electrical Specifications

The current consumption data listed in the following tables is applicable to all devices and is obtained under the common conditions in 表 38, unless otherwise stated.

The minimum and maximum values in the following tables represent the worst conditions across process variation at T_A = 25°C.

Sleep Current Consumption

表 39 Current consumption in sleep modes
Symbol	Condition1	Condition2	Condition3	Typ.	Unit
I_{UDS,RAM_OFF, RESET}	Ultra deep sleep mode	No RAM retention	Woken up on reset	1.9	μA
I_{UDS,RAM_OFF, AON_GPIO}			Woken up on AON GPIO	1.9	μA
I_{UDS,RAM_OFF,SLP_TIMER}			Woken up on Sleep Timer	1.9	μA
I_{UDS,RAM_OFF,SLP_TIMER_LFRC}			Woken up on Sleep Timer (running from LFRC_32K clock)	1.9	μA
I_{S,RAM_OFF,ANY}	Sleep mode		Woken up on any events	2.2	μA
I_{S,RAM48K_RET,BLE}		Full 48 KB RAM retention	Woken up on Bluetooth LE controller	2.6	μA
I_{S,RAM96K_RET,BLE}		Full 96 KB RAM retention	Woken up on Bluetooth LE controller	2.8	μA
I_{S,RAM96K_RET,BLE_LFRC}			Woken up on Bluetooth LE controller (running from LFRC_32K clock)	2.8	μA
I_{S,RAM96K_RET,SLP_TIMER}			Woken up on sleep timer	2.8	μA
I_{S,RAM96K_RET,COMP}			Woken up on LPCOMP	3.0	μA
I_{S,RAM96K_RET,SLP_TIMER_LFRC}			Woken up on sleep timer (running from LFRC_32K clock)	2.8	μA
I_{S,RAM96K_RET,RTC}			Woken up on RTC	2.8	μA

MCU Current Consumption

表 40 MCU current consumption at 2.0 V
Symbol	Condition1	Condition2	Condition3	Typ.	Unit
I_COREMARK	CPU running CoreMark from Flash			3.0	mA
I_{COREMARK,SYS_LDO}		Regulator = SYS_LDO		4.1	mA
I_{COREMARK,64M_HFXO}			System clock = 64 MHz from HFXO clock	3.8	mA
I_{COREMARK,16M_HFRC}			System clock = 16 MHz from HFRC clock	1.3	mA
I_LOOP	CPU running while loop from Flash			2.5	mA
I_{LOOP,SYS_LDO}		Regulator = SYS_LDO		3.4	mA
I_{LOOP,64M_HFXO}			System clock = 64 MHz from HFXO clock	3.2	mA
I_IDLE	CPU idle			1.4	mA
I_{IDLE,SYS_LDO}		Regulator = SYS_LDO		2.0	mA
I_{IDLE,64M_HFXO}			System clock = 64 MHz from HFXO clock	2.2	mA

表 41 MCU current consumption at 3.3 V
Symbol	Condition1	Condition2	Condition3	Typ.	Unit
I_COREMARK	CPU running CoreMark from Flash			2.0	mA
I_{COREMARK,SYS_LDO}		Regulator = SYS_LDO		4.2	mA
I_{COREMARK,64M_HFXO}			System clock = 64 MHz from HFXO clock	2.5	mA
I_{COREMARK,16M_HFRC}			System clock = 16 MHz from HFRC clock	0.9	mA
I_LOOP	CPU running while loop from Flash			1.8	mA
I_{LOOP,SYS_LDO}		Regulator = SYS_LDO		3.6	mA
I_{LOOP,64M_HFXO}			System clock = 64 MHz from HFXO clock	2.3	mA
I_IDLE	CPU idle			1.2	mA
I_{IDLE,SYS_LDO}		Regulator = SYS_LDO		2.2	mA
I_{IDLE,64M_HFXO}			System clock = 64 MHz from HFXO clock	1.7	mA

Radio Current Consumption

GR533x family members support different power amplifiers for optimal power performance:

GR5331: ultra-low power amplifier (UPA, -15 dBm to 2 dBm), and small power amplifier (SPA, -20 dBm to 6 dBm)
GR5332: small power amplifier (SPA, -20 dBm to 5 dBm), and high power amplifier (HPA, -10 dBm to 15 dBm)

Where UPA uses a different matching network circuit, compared with other power amplifiers, to achieve the lowest power consumption.

Please refer to the Bill of Materials of the specific GR533x member for tailored recommendations, including tolerance, component size, recommended manufacturer, and recommended part number.

Radio Transmitting Current Consumption for GR5332

表 42 Radio transmitting current consumption for GR5332 at 3.3 V
Symbol	Condition 1	Condition 2	Condition 3	Typ.	Unit
I_{TRANSMIT,0dBm,SPA,1Mbps,HFXO16M}	1 Mbps Bluetooth LE, SPA, System clock = 16 MHz from HFXO clock		Radio transmitting @0 dBm output power	5.9	mA
I_{TRANSMIT,0dBm,SPA,1Mbps,HFXO64M}	1 Mbps Bluetooth LE, SPA, System clock = 64 MHz from HFXO clock			6.3	mA
I_{TRANSMIT,0dBm,SPA,1Mbps,HFXO64M,SYS_LDO}		Regulator = SYS_LDO		15.5	mA
I_{TRANSMIT,4dBm,SPA,1Mbps,HFXO64M}			Radio transmitting @4 dBm output power	7.7	mA
I_{TRANSMIT,4dBm,SPA,1Mbps,HFXO64M,SYS_LDO}		Regulator = SYS_LDO	Radio transmitting @4 dBm output power	19	mA
I_{TRANSMIT,-20dBm,SPA,1Mbps,HFXO64M}			Radio transmitting @-20 dBm output power	3.3
I_{TRANSMIT,4dBm,HPA,1Mbps,HFXO64M,SYS_LDO}	1Mbps Bluetooth LE, HPA, System clock = 64 MHz from HFXO clock	Regulator = SYS_LDO	Radio transmitting @4 dBm output power	33.5	mA
I_{TRANSMIT,15dBm,HPA,1Mbps,HFXO64M,SYS_LDO}			Radio transmitting @15 dBm output power	86.3	mA
I_{TRANSMIT,-10dBm,HPA,1Mbps,HFXO64M,SYS_LDO}			Radio transmitting @-10 dBm output power	16	mA

Radio Transmitting Current Consumption for GR5331

表 43 Radio transmitting current consumption for GR5331 at 2.0 V
Symbol	Condition 1	Condition 2	Typ.	Unit
I_{TRANSMIT,0dBm,UPA,1Mbps,HFXO16M}	1 Mbps Bluetooth LE, UPA, System clock = 16 MHz from HFXO clock	Radio transmitting @0 dBm output power	5.7	mA
I_{TRANSMIT,0dBm,UPA,1Mbps,HFXO64M}	1 Mbps Bluetooth LE, UPA, System clock = 64 MHz from HFXO clock	Radio transmitting @0 dBm output power	6.2	mA
I_{TRANSMIT, -15dBm,UPA,1Mbps,HFXO64M}		Radio transmitting @-15 dBm output power	4.5	mA
I_{TRANSMIT,0dBm,SPA,1Mbps,HFXO16M}	1 Mbps Bluetooth LE, SPA, System clock = 16 MHz from HFXO clock	Radio transmitting @0 dBm output power	7.7	mA
I_{TRANSMIT,0dBm,SPA,1Mbps,HFXO64M}	1 Mbps Bluetooth LE, SPA, System clock = 64 MHz from HFXO clock	Radio transmitting @0 dBm output power	8.2	mA
I_{TRANSMIT,5dBm,SPA,1Mbps,HFXO64M}		Radio transmitting @5 dBm output power	12.1	mA
I_{TRANSMIT, -20dBm,SPA,1Mbps,HFXO64M}		Radio transmitting @-20 dBm output power	5.0	mA

表 44 Radio transmitting current consumption for GR5331 at 3.3 V
Symbol	Condition 1	Condition 2	Typ.	Unit
I_{TRANSMIT,0dBm,UPA,1Mbps,HFXO16M}	1 Mbps Bluetooth LE, UPA, System clock = 16 MHz from HFXO clock	Radio transmitting @0 dBm output power	3.8	mA
I_{TRANSMIT,0dBm,UPA,1Mbps,HFXO64M}	1 Mbps Bluetooth LE, UPA, System clock = 64 MHz from HFXO clock	Radio transmitting @0 dBm output power	4.1	mA
I_{TRANSMIT,-15dBm,UPA,1Mbps,HFXO64M}		Radio transmitting @-15 dBm output power	3.1	mA
I_{TRANSMIT,0dBm,SPA,1Mbps,HFXO16M}	1 Mbps Bluetooth LE, SPA, System clock = 16 MHz from HFXO clock	Radio transmitting @0 dBm output power	5.0	mA
I_{TRANSMIT,0dBm,SPA,1Mbps,HFXO64M}	1 Mbps Bluetooth LE, SPA, System clock = 64 MHz from HFXO clock	Radio transmitting @0 dBm output power	5.3	mA
I_{TRANSMIT,5dBm,SPA,1Mbps,HFXO64M}		Radio transmitting @5 dBm output power	7.9	mA
I_{TRANSMIT, -20dBm,SPA,1Mbps,HFXO64M}		Radio transmitting @-20 dBm output power	3.4	mA

Radio Receiving Current Consumption for GR5332

表 45 Radio receiving current consumption for GR5332 at 3.3 V
Symbol	Condition 1	Condition 2	Condition 3	Typ.	Unit
I_{RECEIVE,1Mbps,64M_HFXO}	Radio receiving @ 1 Mbps Bluetooth LE mode		System Clock = 64 MHz from HFXO clock	5.2	mA
I_{RECEIVE,1Mbps,16M_HFXO}			System Clock = 16 MHz from HFXO clock	4.9	mA
I_{RECEIVE,1Mbps,SYS_LDO, 64M_HFXO}		Regulator = SYS_LDO	System Clock = 64 MHz from HFXO clock	12.8	mA
I_{RECEIVE,1Mbps,SYS_LDO,16M_HFXO}		Regulator = SYS_LDO	System Clock = 16 MHz from HFXO clock	12.0	mA

Radio Receiving Current Consumption for GR5331

表 46 Radio receiving current consumption for GR5331 at 2.0 V
Symbol	Condition 1	Condition 2	Min.	Typ.	Max.	Unit
I_{RECEIVE,1Mbps,64M_HFXO}	Radio receiving @ 1 Mbps Bluetooth LE mode	System clock = 64 MHz from HFXO clock		8.5		mA
I_{RECEIVE,1Mbps,16M_HFXO}	Radio receiving @ 1 Mbps Bluetooth LE mode	System clock = 16 MHz from HFXO clock		7.3		mA

表 47 Radio receiving current consumption for GR5331 at 3.3 V
Symbol	Condition 1	Condition 2	Min.	Typ.	Max.	Unit
I_{RECEIVE,1Mbps,64M_HFXO}	Radio receiving @ 1 Mbps Bluetooth LE mode	System clock = 64 MHz from HFXO clock		5.0		mA
I_{RECEIVE,1Mbps,16M_HFXO}	Radio receiving @ 1 Mbps Bluetooth LE mode	System clock = 16 MHz from HFXO clock		4.7		mA

ADC Current Consumption

表 48 ADC current consumption
Symbol	Condition 1	Condition 2	Typ.	Unit
I_{ADC,4KHz,128_POINTS}	CPU running, acquiring 128 points	ADC sampling@4 kHz sample clock	120	uA
I_{ADC,16KHz,128_POINTS}		ADC sampling@16 kHz sample clock	120	uA
I_{ADC,1MHz,128_POINTS}		ADC sampling@1 MHz sample clock	120	uA
I_{ADC,16MHz,128_POINTS}		ADC sampling@16 MHz sample clock	120	uA

TEMP Current Consumption

表 49 TEMP current consumption
Symbol	Condition	Min.	Typ.	Max.	Unit
I_TEMP	TEMP measurement started		TBD		mA

VBAT Current Consumption

表 50 VBAT current consumption
Symbol	Condition	Min.	Typ.	Max.	Unit
I_VBAT	VBAT measurement started		TBD		mA

COMP Current Consumption

表 51 COMP current consumption
Symbol	Condition	Min.	Typ.	Max.	Unit
I_COMP	COMP started		0.2		μA

BOD Current Consumption

表 52 BOD current consumption
Symbol	Condition	Min.	Typ.	Max.	Unit
I_BOD,Reset	BOD running		200		nA
I_{BOD,Interrupt}	BOD interrupt enabled		50		nA

TRNG Current Consumption

表 53 TRNG current consumption
Symbol	Condition	Min.	Typ.	Max.	Unit
I_TRNG	TRNG running		TBD		μA

DMA Current Consumption

表 54 DMA current consumption
Symbol	Condition	Min.	Typ.	Max.	Unit
I_DMA,M2M	DMA running, memory to memory		TBD		μA

Typical Current Curves

Typical current curves indicate typical current under the conditions as stated below.

Sleep Mode

Typical conditions: VBAT = 3.3 V, system clock = 32.768 kHz@LFXO, Flash power-off.

The figure below shows the typical current curves of the device in sleep mode with different SRAM retention modes.

图 29 Typical current curves of the device in sleep mode

Active Mode

Typical conditions: VBAT = 3.3 V, system clock = 64 MHz@HFXO, regulator = DC-DC.

The figure below shows the typical current curves of the device in active mode (Coremark vs. While(1)) with various temperatures.

图 30 Typical current curves of the device in active mode

Radio Transmission

Radio Transmitting @ 0dBm Output Power for GR5331

Typical conditions: system clock = 64 MHz @HFXO, regulator = DC-DC, RF power amplifier = UPA.

The figure below shows the typical current curves of the GR5331 at 0 dBm TX output power, with various supply voltages and temperatures.

图 31 Typical current curves of the GR5331 at 0 dBm TX output power

Radio Transmitting @ 6dBm Output Power for GR5331

Typical conditions: system clock = 64 MHz @HFXO, regulator = DC-DC, RF power amplifier = SPA.

The figure below shows the typical current curves of the GR5331 at 6 dBm TX output power, with various supply voltages and temperatures.

图 32 Typical current curves of the GR5331 at 6 dBm TX output power

Radio Transmitting @ 15dBm Output Power for GR5332

Typical conditions: System clock = 64 MHz @HFXO, regulator = SYS_LDO, RF power amplifier = HPA.

The figure below shows the typical current curves of the GR5332 at 15 dBm TX output power, considering various supply voltages and temperatures.

图 33 Typical current curves of the GR5332 at 15 dBm TX output power