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Национальный исследовательский университет «МИЭТ»

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Электротехника

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LMZM23600

www.ti.com

SNVSB53B –FEBRUARY 2018–REVISED MAY 2019

7.6 System Characteristics

The following specifications apply to a typical applications circuit, with nominal component values. Specifications in the typical (TYP) column apply to TJ = 25°C. Specifications in the minimum (MIN) and maximum (MAX) columns apply to the case of typical components over the temperature range of TJ = –40°C to 125°C. These specifications are not ensured by production testing.

	PARAMETER	TEST CONDITIONS	MIN	TYP	MAX	UNIT
SUPPLY CURRENT
		VIN = 12 V, VOUT = 3.3 V, IOUT = 0 A,		25
		fixed output option, EN connected		25
		to VIN
		VIN =12 V, VOUT = 5 V, IOUT = 0 A,		32
		fixed output option, EN connected		32
IQ-VIN	Input current to the DC-DC converter	to VIN				µA
IQ-VIN	while in regulation	VIN =24 V, VOUT = 3.3 V, IOUT = 0 A,		24		µA
		fixed output option, EN connected		24
		to VIN
		VIN = 24 V, VOUT = 5 V, IOUT = 0 A,		28
		fixed output option, EN connected		28
		to VIN
EFFICIENCY
Efficiency	Typical efficiency 12-V input	VIN = 12 V, VOUT = 5 V, IOUT = 0.5 A		90%
Efficiency	Typical efficiency 12-V input	VIN = 12 V, VOUT = 3.3 V, IOUT = 0.5 A		87%
Efficiency	Typical efficiency 24-V input	VIN = 24 V, VOUT = 5 V, IOUT = 0.5 A		87%
Efficiency	Typical efficiency 24-V input	VIN = 24 V, VOUT = 3.3 V, IOUT = 0.5 A		83%
Efficiency	Typical efficiency 24-V input	VIN = 24 V, VOUT = 12 V, IOUT = 0.5 A		93%

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SNVSB53B –FEBRUARY 2018–REVISED MAY 2019

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7.7 Typical Characteristics

VIN = 24 V, TA = 25°C (unless otherwise noted). Refer to default evaluation board layout and bill of materials.

	30														70
	28														65								VOUT = 3.3 V
															65								VOUT = 5.0 V

															60
(V)	26														60
	26
															55
Maximum Input Voltage	24													Supply Current (PA)	55
	24														50
															50
	22														45
															45
	20														40
	18														35
	18
	16														30
	16
															25
	14														20
	14

	12														15
															15
	10														10
	1.2	1.3	1.4	1.5	1.6	1.7	1.8	1.9	2	2.1	2.2	2.3	2.4		0	4	8	12	16		20	24	28	32	36
					Output Voltage (V)								D099						Input Voltage (V)						D041
													D099												D041
	Figure 1. Maximum Input Voltage for VOUT < 2.5V													Fixed output voltage options										EN = VIN
														Output voltage in regulation										Load = Open
																	Figure 2. Input Supply Current
	3.5														5.1
	3.4														5
	3.3														4.9
(V)	3.2													(V)	4.8
(V)														(V)
Voltage	3.1													Voltage	4.7
	3														4.6

Output	2.9													Output	4.5
Output	2.8													Output	4.4
	2.8														4.4
	2.7														4.3
	2.6									IOUT = 0.5 A					4.2								IOUT = 0.5 A
	2.6									IOUT = 0.25 A					4.2								IOUT = 0.25 A
										IOUT = 0.25 A													IOUT = 0.25 A
	2.5														4.1
	3.3	3.5		3.7	3.9		4.1	4.3		4.5	4.7	4.9			4.5	4.7	4.9	5.1	5.3	5.5	5.7	5.9	6.1	6.3	6.5
						Input Voltage (V)							D034						Input Voltage (V)						D036
													D034												D036
	VOUT = 3.3 V														VOUT = 5 V
																		Figure 4. Dropout Voltage
				Figure 3. Dropout Voltage
	12.2														15.2
	12														15
	11.8														14.8
(V)	11.6													(V)	14.6
(V)	11.4													(V)	14.4
Voltage	11.4													Voltage	14.4
	11.2														14.2
	11														14
Output	11													Output	14
	10.8														13.8
	10.6														13.6
	10.6														13.6
	10.4														13.4
	10.2									IOUT = 0.5 A					13.2								IOUT = 0.5 A
	10.2									IOUT = 0.25 A					13.2								IOUT = 0.25 A
										IOUT = 0.25 A													IOUT = 0.25 A
	10														13
	11		11.4	11.8		12.2	12.6		13		13.4	13.8			14	14.4		14.8	15.2	15.6		16	16.4	16.8
						Input Voltage (V)							D038						Input Voltage (V)						D040
													D038												D040
	VOUT = 12 V														VOUT = 15 V
				Figure 5. Dropout Voltage
																		Figure 6. Dropout Voltage

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SNVSB53B –FEBRUARY 2018–REVISED MAY 2019

Typical Characteristics (continued)

VIN = 24 V, TA = 25°C (unless otherwise noted). Refer to default evaluation board layout and bill of materials.

	50												75
	40											(qC/W)	70
	40											to Ambient	70
(dBPV/m)	30												65
(dBPV/m)
Emissions	20											Resistance	60
Emissions												Resistance
	10						CISPR11 Class A Limit					Thermal	55
							CISPR11 Class A Limit
							CISPR11 Class B Limit							2-Layer
							Evaluation Board							4-Layer
							Evaluation Board							4-Layer
	0												50
	0	100	200	300	400	500	600	700	800	900	1000		5	10		15	20		25	30		35	40
					Frequency (MHz)						D043					Board Area (cm2)							D032
											D043												D032
VIN = 24 V				OUT = 5 V						IOUT = 0.5 A
Default EVM Layout and BOM														Figure 8. Package Thermal Resistance vs Board
														Figure 8. Package Thermal Resistance vs Board
				Figure 7. Radiated EMI												Copper Area, No Air Flow
	1.5												1.2
		VIN = 18 V PFM												VIN = 15 V PFM
	1.25	VIN = 18 V FPWM											1	VIN = 15 V FPWM
	1.25	VIN = 22 V PFM											1	VIN = 18 V PFM
(W)		VIN = 22 V FPWM										(W)		VIN = 18 V FPWM
(W)	1	VIN = 24 V PFM										(W)	0.8	VIN = 24 V PFM
Dissipation	1	VIN = 24 V FPWM										Dissipation	0.8	VIN = 24 V FPWM
		VIN = 24 V FPWM												VIN = 24 V FPWM
		VIN = 36 V PFM												VIN = 36 V PFM
	0.75	VIN = 36 V FPWM											0.6	VIN = 36 V FPWM
	0.75												0.6

Power	0.5											Power	0.4
Power												Power
	0.25												0.2
	0												0
	0	0.05	0.1	0.15	0.2	0.25	0.3	0.35	0.4	0.45	0.5		0	0.05	0.1	0.15	0.2	0.25	0.3	0.35	0.4	0.45	0.5
					Output Current (A)						D021					Output Current (A)							D019
											D021												D019
	VOUT = 15 V												VOUT = 12 V
			Figure 9. Power Dissipation												Figure 10. Power Dissipation
	1.2												1.2
		VIN = 6.5 V PFM												VIN = 5 V PFM
	1	VIN = 6.5 V FPWM											1	VIN = 5 V FPWM
	1	VIN = 12 V PFM											1	VIN = 12 V PFM
(W)		VIN = 12 V FPWM										(W)		VIN = 12 V FPWM
(W)	0.8	VIN = 24 V PFM										(W)	0.8	VIN = 24 V PFM
Dissipation	0.8	VIN = 24 V FPWM										Dissipation	0.8	VIN = 24 V FPWM
		VIN = 24 V FPWM												VIN = 24 V FPWM
		VIN = 36 V PFM												VIN = 36 V PFM
	0.6	VIN = 36 V FPWM											0.6	VIN = 36 V FPWM
	0.6												0.6

Power	0.4											Power	0.4
Power												Power
	0.2												0.2
	0												0
	0	0.05	0.1	0.15	0.2	0.25	0.3	0.35	0.4	0.45	0.5		0	0.05	0.1	0.15	0.2	0.25	0.3	0.35	0.4	0.45	0.5
					Output Current (A)						D015					Output Current (A)							D017
											D015												D017
	VOUT = 5 V												VOUT = 3.3 V
			Figure 11. Power Dissipation												Figure 12. Power Dissipation

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SNVSB53B –FEBRUARY 2018–REVISED MAY 2019

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Typical Characteristics (continued)

VIN = 24 V, TA = 25°C (unless otherwise noted). Refer to default evaluation board layout and bill of materials.

	1.2												0.5
		VIN = 5 V PFM												VIN = 5 V PFM
	1	VIN = 5 V FPWM												VIN = 5 V FPWM
	1	VIN = 12 V PFM											0.4	VIN = 12 V PFM
		VIN = 12 V FPWM											0.4	VIN = 12 V FPWM
(W)		VIN = 12 V FPWM										(W)		VIN = 12 V FPWM
(W)	0.8	VIN = 24 V PFM										(W)		VIN = 15 V PFM
Dissipation	0.8	VIN = 24 V FPWM										Dissipation		VIN = 15 V FPWM
		VIN = 24 V FPWM											0.3	VIN = 15 V FPWM
		VIN = 36 V PFM											0.3
		VIN = 36 V PFM
	0.6	VIN = 36 V FPWM
	0.6
													0.2
Power												Power	0.2
	0.4

	0.2												0.1
	0.2
	0												0
	0	0.05	0.1	0.15	0.2	0.25	0.3	0.35	0.4	0.45	0.5		0		0.1		0.2		0.3		0.4		0.5
				Output Current (A)							D013					Output Current (A)							D093
											D013												D093
	VOUT = 2.5 V												VOUT = 1.8 V
			Figure 13. Power Dissipation												Figure 14. Power Dissipation
	0.5												0.6
		VIN = 5 V PFM
		VIN = 5 V FPWM											0.5
	0.4	VIN = 12 V PFM											0.5
	0.4	VIN = 12 V FPWM
Power Dissipation (W)		VIN = 12 V FPWM
												Output Current (A)	0.4
	0.3
													0.3
	0.2
													0.2

	0.1												0.1
													0.1	VIN = 5 V
														VIN = 5 V
														VIN = 12 V
	0												0
	0		0.1		0.2		0.3		0.4		0.5		30	40	50	60	70	80	90	100	110	120	130
				Output Current (A)							D091				Ambient Temperature (degrees C)								D083
											D091												D083
	VOUT = 1.2 V												VOUT = 1.2 V				Rθ = 58°C/W
			Figure 15. Power Dissipation										Figure 16. Ambient Temperature vs Output Current
	0.6												0.6
	0.5												0.5
(A)	0.4											(A)	0.4
Current	0.3											Current	0.3
Current												Current
Output	0.2											Output	0.2
Output												Output
														VIN = 5 V
	0.1	VIN = 5 V											0.1	VIN = 12 V
		VIN = 12 V												VIN = 18 V
		VIN = 15 V												VIN = 24 V
	0												0
	30	40	50	60	70	80	90	100	110	120	130		30	40	50	60	70	80	90	100	110	120	130
			Ambient Temperature (degrees C)								D084				Ambient Temperature (degrees C)								D023
											D084												D023
	VOUT = 1.8V				Rθ = 58°C/W								VOUT = 2.5 V				Rθ = 58°C/W
	Figure 17. Ambient Temperature vs Output Current												Figure 18. Ambient Temperature vs Output Current

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SNVSB53B –FEBRUARY 2018–REVISED MAY 2019

Typical Characteristics (continued)

VIN = 24 V, TA = 25°C (unless otherwise noted). Refer to default evaluation board layout and bill of materials.

	0.6												0.6
	0.5												0.5
(A)	0.4											(A)	0.4
Current	0.3											Current	0.3
Current												Current
Output	0.2											Output	0.2
Output												Output
		VIN = 5 V
	0.1	VIN = 12 V											0.1	VIN = 12 V
		VIN = 18 V												VIN = 18 V
		VIN = 24 V												VIN = 24 V
	0												0
	30	40	50	60	70	80	90	100	110	120	130		30	40	50	60	70	80	90	100	110	120	130
				Ambient Temperature (degrees C)							D025				Ambient Temperature (degrees C)								D027
											D025												D027
	VOUT = 3.3 V				Rθ = 58°C/W								VOUT = 5 V				Rθ = 58°C/W
	Figure 19. Ambient Temperature vs Output Current												Figure 20. Ambient Temperature vs Output Current
	0.6												0.6
	0.5												0.5
(A)	0.4											(A)	0.4
Current	0.3											Current	0.3
Current												Current
Output	0.2											Output	0.2
Output												Output
	0.1												0.1	VIN = 18 V
		VIN = 18 V												VIN = 24 V
		VIN = 24 V												VIN = 36 V
	0												0
	30	40	50	60	70	80	90	100	110	120	130		30	40	50	60	70	80	90	100	110	120	130
				Ambient Temperature (degrees C)							D029				Ambient Temperature (degrees C)								D031
											D029												D031
	VOUT = 12 V				Rθ = 58°C/W								VOUT = 15 V				Rθ = 58°C/W
	Figure 21. Ambient Temperature vs Output Current												Figure 22. Ambient Temperature vs Output Current
	1100												1100
	1000												1000
(kHz)	900											(kHz)	900
	800												800

Frequency	700											Frequency	700
	600												600
	500												500
Switching	400											Switching	400
	300												300
	200								VIN = 5V				200								VIN = 5V
	200								VIN = 5V				200								VIN = 5V
	100								VIN = 12V				100								VIN = 12V
	100								VIN = 24 V				100								VIN = 24 V
									VIN = 24 V												VIN = 24 V
	0												0
	0		0.1		0.2		0.3		0.4		0.5		0	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1
					Output Current (A)						D046						Output Current (A)						D048
											D046												D048
	VOUT = 2.5 V												VOUT = 3.3 V
	Figure 23. Auto PFM Mode Switching Frequency											Adjustable Option
	Figure 23. Auto PFM Mode Switching Frequency												Figure 24. Auto PFM Mode Switching Frequency
					vs Output Current								Figure 24. Auto PFM Mode Switching Frequency
																vs Output Current

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SNVSB53B –FEBRUARY 2018–REVISED MAY 2019

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Typical Characteristics (continued)

VIN = 24 V, TA = 25°C (unless otherwise noted). Refer to default evaluation board layout and bill of materials.

	900												1100
	800												1000
	800
(kHz)	700											(kHz)	900
	700												800
													800
	600
Frequency	600											Frequency	700
													700
	500												600
	400												500
Switching	300											Switching	400
	300
													300
	200								VIN = 5V				200
									VIN = 5V				200
	100								VIN = 12V				100							VIN = 12V
									VIN = 24 V				100							VIN = 24V
									VIN = 24 V											VIN = 24V
	0												0
	0	0.05	0.1	0.15	0.2	0.25	0.3	0.35	0.4	0.45	0.5		0		0.1	0.2		0.3		0.4	0.5
					Output Current (A)						D058					Output Current (A)					D050
											D058	VOUT = 5 V Adjustable									D050
	VOUT = 3.3 V Fixed Option											VOUT = 5 V Adjustable
		Figure 25. Auto PFM Mode Switching Frequency													Option
		Figure 25. Auto PFM Mode Switching Frequency											Figure 26. Auto PFM Mode Switching Frequency
				vs Output Current									Figure 26. Auto PFM Mode Switching Frequency
				vs Output Current												vs Output Current
																vs Output Current
	900												1100
	800												1000
	800
(kHz)	700											(kHz)	900
	700												800
													800
	600
Frequency	600											Frequency	700
													700
	500												600
	400												500
Switching	300											Switching	400
	300
													300
	200												200
													200
	100								VIN = 12V				100							VIN = 24V
									VIN = 24V				100
									VIN = 24V
	0												0
	0	0.05	0.1	0.15	0.2	0.25	0.3	0.35	0.4	0.45	0.5		0		0.1	0.2		0.3		0.4	0.5
					Output Current (A)						D060					Output Current (A)					D052
											D060			VOUT = 12 V							D052
	VOUT = 5 V Fixed Option													VOUT = 12 V
		Figure 27. Auto PFM Mode Switching Frequency											Figure 28. Auto PFM Mode Switching Frequency
				vs Output Current												vs Output Current
	1100												1100
	1000												1000
(kHz)	900											(kHz)	900
	800												800

Frequency	700											Frequency	700
	600												600
	500												500
Switching	400											Switching	400
	300												300						VOUT = 2.5V
	300												300						VOUT = 3.3V
																			VOUT = 3.3V
	200												200						VOUT = 5.0V
	200												200						VOUT = 5.0V
	100												100						VOUT = 12V
	100								VIN = 24V				100						VOUT = 15V
									VIN = 24V										VOUT = 15V
	0												0
	0		0.1		0.2		0.3		0.4		0.5		4	8	12	16	20	24	28	32	36
					Output Current (A)						D054					Input Voltage (V)					D056
											D054										D056
		VOUT = 15 V
		Figure 29. Auto PFM Mode Switching Frequency											Figure 30. Switching Frequency vs Input Voltage for
				vs Output Current										Adjustable Output Options at Full Load

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SNVSB53B –FEBRUARY 2018–REVISED MAY 2019

Typical Characteristics (continued)

VIN = 24 V, TA = 25°C (unless otherwise noted). Refer to default evaluation board layout and bill of materials.

Switching Frequency (kHz)

	1100
	1000
	900
	800
	700
	600
	500
	400
	300
	200
	100	VOUT = 5.0 V FIXED
	100	VOUT = 3.3V FIXED
		VOUT = 3.3V FIXED
	0

0 5 10 15 20 25 30 35 40

Input Voltage (V)

D062

Figure 31. Switching Frequency vs Input Voltage for Fixed Output Options at Full Load

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