47.3 Power Consumption

The values in this section are measured values of power consumption under the following conditions, except where noted:

Operating Conditions
- V_VDDIN = 3.3V or 1.8V
- For V_DDIN=1.8V, CPU is running on Flash with 3 wait states
- For V_DDIN=3.3V, CPU is running on Flash with 1 wait state in PL0 and 2 wait states in PL2.
- Low power cache is enabled
- BOD33 is disabled
Oscillators
- XOSC (crystal oscillator) stopped
- XOSC32K (32KHz crystal oscillator) running with external 32KHz crystal
- When in active Performance Level 2 (PL2) mode, DFLL48M is running at 48MHz and using XOSC32K as reference
- When in active PL0 mode, the internal Multi RC Oscillator is running at specified frequency
Clocks
- DFLL48M used as main clock source when in PL2 mode. In PL0 mode, OSC16M used at 4, 8, or 12MHz
- Clock masks and dividers at reset values: All AHB & APB clocks enabled, CPUDIV=1, BUPDIV=8, LPDIV=1
- I/Os are configured in Digital Functionality Disabled mode

Table 47-2. Active Current Consumption - 105°C⁽¹⁾
Mode	Conditions	Regulator	PL	Clock	Vcc	Ta	Typ.	Max.	Units
ACTIVE	COREMARK	LDO	PL0	OSC 12MHz	1.8V	Max at 105°C Typ at 25°C	77	118	µA/MHz
				OSC 12MHz	3.3V		79	125
				OSC 8MHz	1.8V		80	149
				OSC 8MHz	3.3V		82	154
				OSC 4MHz	1.8V		89	231
				OSC 4MHz	3.3V		92	238
			PL2	DFLL 48MHz	1.8V		93	105
			PL2	DFLL 48MHz	3.3V		95	109
		BUCK	PL0	OSC 12MHz	1.8V		47	75
				OSC 12MHz	3.3V		32	52
				OSC 8MHz	1.8V		50	95
				OSC 8MHz	3.3V		34	66
				OSC 4MHz	1.8V		57	146
				OSC 4MHz	3.3V		42	105
			PL2	DFLL 48MHz	1.8V		67	79
			PL2	DFLL 48MHz	3.3V		40	48
	FIBO	LDO	PL0	OSC 12MHz	1.8V		76	121
				OSC 12MHz	3.3V		78	125
				OSC 8MHz	1.8V		79	149
				OSC 8MHz	3.3V		81	153
				OSC 4MHz	1.8V		89	230
				OSC 4MHz	3.3V		91	238
			PL2	DFLL 48MHz	1.8V		94	107
			PL2	DFLL 48MHz	3.3V		95	108
		BUCK	PL0	OSC 12MHz	1.8V		47	77
				OSC 12MHz	3.3V		31	52
				OSC 8MHz	1.8V		50	94
				OSC 8MHz	3.3V		34	65
				OSC 4MHz	1.8V		57	146
				OSC 4MHz	3.3V		42	104
			PL2	DFLL 48MHz	1.8V		67	80
			PL2	DFLL 48MHz	3.3V		40	48
ACTIVE	WHILE1	LDO	PL0	OSC 12MHz	1.8V	Max at 105°C Typ at 25°C	60	105	µA/MHz
				OSC 12MHz	3.3V		62	108
				OSC 8MHz	1.8V		63	133
				OSC 8MHz	3.3V		65	137
				OSC 4MHz	1.8V		72	214
				OSC 4MHz	3.3V		75	221
			PL2	DFLL 48MHz	1.8V		73	86
			PL2	DFLL 48MHz	3.3V		73	87
		BUCK	PL0	OSC 12MHz	1.8V		38	67
				OSC 12MHz	3.3V		26	46
				OSC 8MHz	1.8V		40	84
				OSC 8MHz	3.3V		29	60
				OSC 4MHz	1.8V		47	136
				OSC 4MHz	3.3V		36	99
			PL2	DFLL 48MHz	1.8V		52	63
			PL2	DFLL 48MHz	3.3V		31	39
IDLE			PL0	OSC 12MHz	1.8V		17	45
IDLE			PL0	OSC 12MHz	3.3V		13	33

Note: 1. These values are based on characterization.

Table 47-3. Standby, Backup and Off Mode Current Consumption⁽¹⁾
Mode	Conditions	Regulator Mode	Vcc	Ta	Typ.	Max.	Units
STANDBY	PD0, PD1, PD2 in retention state	LPEFF Disable	1.8V	25°C	1.3	3.1	µA
		LPEFF Disable	1.8V	105°C	65.8	142
		LPEFF Enable	3.3V	25°C	1.2	2.7
		LPEFF Enable	3.3V	105°C	46.7	99.3
		BUCK with STDBPL0	1.8V	25°C	1.3	2.7
			1.8V	105°C	45.0	95.8
			3.3V	25°C	1.1	2.3
			3.3V	105°C	34.0	74.1
	PD0, PD1, PD2 in retention state with RTC running on OSCULP32K	LPEFF Disable	1.8V	25°C	1.5	3.2
		LPEFF Disable	1.8V	105°C	66.0	142
		LPEFF Enable	3.3V	25°C	1.4	2.9
		LPEFF Enable	3.3V	105°C	46.7	99.6
		BUCK with STDBPL0	1.8V	25°C	1.4	2.8
			1.8V	105°C	45.0	95.8
			3.3V	25°C	1.2	2.4
			3.3V	105°C	34.0	74.2
	PD1, PD2 in retention state and PD0 in active state	LPEFF Disable	1.8V	25°C	1.6	3.6
		LPEFF Disable	1.8V	105°C	76.2	166
		LPEFF Enable	3.3V	25°C	1.4	3.2
		LPEFF Enable	3.3V	105°C	52.7	113
		BUCK with STDBPL0	1.8V	25°C	1.4	3.1
			1.8V	105°C	51.4	112
			3.3V	25°C	1.3	2.6
			3.3V	105°C	38.1	85
	PD2 in retention state and PD0, PD1 in active state	LPEFF Disable	1.8V	25°C	2.3	5.6
		LPEFF Disable	1.8V	105°C	129	279
		LPEFF Enable	3.3V	25°C	2.0	4.8
		LPEFF Enable	3.3V	105°C	80.0	250
		BUCK with STDBPL0	1.8V	25°C	2.0	4.7
			1.8V	105°C	84.5	176
			3.3V	25°C	1.6	3.5
			3.3V	105°C	56.7	125
STANDBY	PD0, PD1, PD2 in active state	LPEFF Disable	1.8V	25°C	3.3	7.9	µA
		LPEFF Disable	1.8V	105°C	194	412
		LPEFF Enable	3.3V	25°C	2.8	6.3
		LPEFF Enable	3.3V	105°C	165	391
		BUCK with STDBPL0	1.8V	25°C	2.7	6.4
			1.8V	105°C	120	254
			3.3V	25°C2.0		4.6
			3.3V	105°C	79.5	169
BACKUP	powered by VDDIN VDDIN+VDDANA+VDDIO consumption		1.8V	25°C	0.5	0.9	µA
			1.8V	105°C	10.0	23.2
			3.3V	25°C	0.6	1.2
			3.3V	105°C	13.2	31.8
	powered by VDDIN VBAT consumption		1.8V	25°C	-0.002	0.004
			1.8V	105°C	0.03	0.07
			3.3V	25°C	0.01	0.03
			3.3V	105°C	0.06	0.16
	powered by VDDIN with RTC running VDDIN+VDDANA+VDDIO consumption		1.8V	25°C	0.5	0.9
			1.8V	105°C	10.1	23.3
			3.3V	25°C	0.7	1.2
			3.3V	105°C	13.3	31.9
	powered by VDDIN with RTC running VBAT consumption		1.8V	25°C	0.000	0.005
			1.8V	105°C	0.03	0.07
			3.3V	25°C	0.008	0.018
			3.3V	105°C	0.05	0.15
	powered by VBAT VDDIN+VDDANA+VDDIO consumption		1.8V	25°C	0.1	0.3
			1.8V	105°C	6.3	13.2
			3.3V	25°C	0.2	0.5
			3.3V	105°C	9.6	21.4
	powered by VBAT VBAT consumption		1.8V	25°C	0.4	0.6
			1.8V	105°C	4.3	10.1
			3.3V	25°C	0.4	0.6
			3.3V	105°C	4.4	10.5
BACKUP	powered by VBAT with RTC running VDDIN+VDDANA+VDDIO consumption		1.8V	25°C	0.14	0.25	µA
			1.8V	105°C	6.4	13.2
			3.3V	25°C	0.2	0.5
			3.3V	105°C	9.5	21.4
	powered by VBAT with RTC running VBAT consumption		1.8V	25°C	0.4	0.7
			1.8V	105°C	4.3	10.2
			3.3V	25°C	0.5	0.7
			3.3V	105°C	4.5	10.6
OFF			1.8V	25°C	0.16	0.29	µA
			1.8V	105°C	6.6	13.7
			3.3V	25°C	0.2	0.5
			3.3V	105°C	9.9	22.2

Note: 1. These values are based on characterization.

SAM L21

47.3 Power Consumption