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ZHCSEL7A November 2015 – December 2015 TPS548A20

PRODUCTION DATA.

封裝選項

機械數據 (封裝 | 引腳)

RVE|28
- MPQF709

散熱焊盤機械數據 (封裝 | 引腳)

RVE|28
- QFND366A

訂購信息

zhcsel7a_oa

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)⁽¹⁾

			MIN	MAX	UNIT
Input voltage range⁽²⁾	EN		–0.3	7.7	V
	SW	DC	–3	25
	SW	Transient < 10 ns	–5	27
	VBST		–0.3	31
	VBST⁽³⁾		–0.3	6
	VBST when transient < 10 ns			33
	VDD		–0.3	28
	VIN		–0.3	25
	FB, MODE, VO		–0.3	6
Output voltage range	PGOOD		–0.3	7.7	V
Output voltage range	TRIP, VREG		–0.3	6	V
Junction temperature, T_J			–40	150	°C
Storage temperature, T_stg			–55	150	°C

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods my affect device reliability.

(2) All voltages are with respect to network ground terminal.

(3) Voltage values are with respect to the SW terminal.

6.2 ESD Ratings

			VALUE	UNIT
V_(ESD)	Electrostatic discharge	Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001⁽¹⁾	±2500	V
V_(ESD)	Electrostatic discharge	Charged-device model (CDM), per JEDEC specification JESD22-C101⁽²⁾	±1500	V

(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

		MIN	MAX	UNIT
Input voltage range	EN	–0.1	7	V
	SW	–3	20
	VBST	–0.1	25.5
	VBST⁽¹⁾	–0.1	5.5
	VDD	4.5	25
	VIN	1.5	20
	FB, MODE, VO	–0.1	5.5
Output voltage range	PGOOD	–0.1	7	V
Output voltage range	TRIP, VREG	–0.1	5.5	V
Ambient temperature, T_A		–40	125	°C

(1) Voltage values are with respect to the SW pin.

6.4 Electrical Characteristics

over operating free-air temperature range, VDD = 12V, V_REG = 5 V, V_EN = 5 V (unless otherwise noted)

PARAMETER		TEST CONDITIONS	MIN	TYP	MAX	UNIT
SUPPLY CURRENT
I_VDD	VDD bias current	T_A = 25°C, No load Power conversion enabled (no switching)		1350	1850	µA
I_VDDSTBY	VDD standby current	T_A = 25°C, No load Power conversion disabled		850	1150	µA
I_VIN(leak)	VIN leakage current	T_A = 25°C, V_EN = 0 V			0.5	µA
VREF OUTPUT
V_VREF	Reference voltage	FB w/r/t GND, T_A = 25°C	597	600	603	mV
V_VREFTOL	Reference voltage tolerance	FB w/r/t GND, -40°C ≤ T_J ≤ 85°C	–0.5		0.5	%
V_VREFTOL	Reference voltage tolerance	FB w/r/t GND, –40°C ≤ T_J ≤ 125°C	–1.0		1.0	%
OUTPUT VOLTAGE
I_FB	FB input current	V_FB = 600 mV		50	100	nA
I_VODIS	VO discharge current	V_VO= 0.5 V, Power Conversion Disabled		6		uA
SMPS FREQUENCY
f_SW	VO switching frequency	V_IN= 12 V, V_VO = 3.3 V, R_RF<0.041		250		kHz
		V_IN= 12 V, V_VO = 3.3 V, R_RF=0.096		300
		V_IN= 12 V, V_VO = 3.3 V, R_RF=0.16		400
		V_IN= 12 V, V_VO = 3.3 V, R_RF=0.229		500
		V_IN= 12 V, V_VO = 3.3 V, R_RF=0.297		600
		V_IN= 12 V, V_VO = 3.3 V, R_RF=0.375		750
		V_IN= 12 V, V_VO = 3.3 V, R_RF=0.461		850
		V_IN= 12 V, V_VO = 3.3 V, R_RF>0.557		1000
t_ON(min)	Minimum on-time	T_A = 25°C⁽¹⁾		60		ns
t_OFF(min)	Minimum off-time	T_A = 25°C	175	240	310	ns
INTERNAL BOOTSTRAP SW
V_F	Forward Voltage	V_VREG–VBST, T_A= 25°C, I_F = 10 mA		0.15	0.25	V
I_VBST	VBST leakage current	T_A = 25°C, V_VBST= 33 V, V_SW = 28 V		0.01	1.5	µA
LOGIC THRESHOLD
V_ENH	EN enable threshold voltage		1.3	1.4	1.5	V
V_ENL	EN disable threshold voltage		1.1	1.2	1.3	V
V_ENHYST	EN hysteresis voltage			0.22		V
V_ENLEAK	EN input leakage current		–1	0	1	µA
SOFT-START
t_SS	Soft-start time			4		ms
POWERGOOD COMPARATOR
V_PGTH	PGOOD threshold	PGOOD in from higher	104	108	111	%
		PGOOD in from lower	89	92	96	%
		PGOOD out to higher	113	116	120	%
		PGOOD out to lower	80	84	87	%
t_PGDLY	PGOOD delay time	Delay for PGOOD going in	0.8	1.0	1.2	ms
t_PGDLY	PGOOD delay time	Delay for PGOOD coming out		2		µs
I_PG	PGOOD sink current	V_PGOOD = 0.5 V	4	6		mA
I_PGLK	PGOOD leakage current	V_PGOOD = 5.0 V	–1	0	1	µA
POWER-ON DELAY
t_PODLY	Power-on delay time	Delay from enable to switching		1.124		ms
CURRENT DETECTION
I_OCL	Current limit threshold, valley	R_TRIP = 49 kΩ	11.5	15.0	17.5	A
I_OCL	Current limit threshold, valley	R_TRIP = 28 kΩ	6.5	8	11	A
I_OCLN	Negative current limit threshold, valley	R_TRIP = 49 kΩ	-18.0	–14.9	-10.5	A
I_OCLN	Negative current limit threshold, valley	R_TRIP = 28 kΩ	-11.5	-8.0	-6.0	A
V_ZC	Zero cross detection offset			0		mV
PROTECTIONS
V_VREGUVLO	VREG undervoltage-lockout (UVLO) threshold voltage	Wake-up	3.25	3.34	3.41	V
V_VREGUVLO	VREG undervoltage-lockout (UVLO) threshold voltage	Shutdown	3.00	3.12	3.19	V
V_VDDUVLO	VDD UVLO threshold voltage	Wake-up (default)	4.15	4.25	4.35	V
V_VDDUVLO	VDD UVLO threshold voltage	Shutdown	3.95	4.05	4.15	V
V_OVP	Overvoltage-protection (OVP) threshold voltage	OVP detect voltage	116	120	124	%
t_OVPDLY	OVP propagation delay	With 100-mV overdrive		300		ns
V_UVP	Undervoltage-protection (UVP) threshold voltage	UVP detect voltage	64	68	71	%
t_UVPDLY	UVP delay	UVP filter delay		1		ms
THERMAL SHUTDOWN
T_SDN	Thermal shutdown threshold⁽¹⁾	Shutdown temperature		140		°C
T_SDN	Thermal shutdown threshold⁽¹⁾	Hysteresis		40		°C
LDO VOLTAGE
V_REG	LDO output voltage	V_IN= 12 V, I_LOAD= 10 mA	4.65	5	5.45	V
V_DOVREG	LDO low droop drop-out voltage	V_IN= 4.5 V, I_LOAD= 30 mA, T_A= 25°C			365	mV
I_LDOMAX	LDO over-current limit	V_IN= 12 V, T_A= 25°C	170	200		mA
INTERNAL MOSFETS
R_DS(on)H	High-side MOSFET on-resistance	T_A= 25°C		9.9	11.4	mΩ
R_DS(on)L	Low-side MOSFET on-resistance	T_A= 25°C		4.3	4.94	mΩ

(1) Specified by design. Not production tested.

6.5 Thermal Information

THERMAL METRIC⁽¹⁾		TPS548A20	UNIT
		RVE (VQFN-CLIP)
		28 PINS
θ_JA	Junction-to-ambient thermal resistance	37.5	°C/W
θ_JCtop	Junction-to-case (top) thermal resistance	34.1	°C/W
θ_JB	Junction-to-board thermal resistance	18.1	°C/W
ψ_JT	Junction-to-top characterization parameter	1.8	°C/W
ψ_JB	Junction-to-board characterization parameter	18.1	°C/W
θ_JCbot	Junction-to-case (bottom) thermal resistance	2.2	°C/W

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report (SPRA953).

6.6 Typical Characteristics

T_A = 25°C (unless otherwise noted)

f_SW = 500 kHz	Auto-skip Mode
V_IN = 12 V

Figure 1. Efficiency vs. Output Current

f_SW = 970 kHz	Auto-skip Mode
V_IN = 12 V

Figure 3. Efficiency vs. Output Current

f_SW = 500 kHz	V_OUT = 1.2 V

Figure 5. DC Load Regulation

f_SW = 500 kHz	V_OUT = 1.2 V

Figure 7. DC Load Regulation

f_SW = 500 kHz	V_IN = 12 V
V_OUT = 5 V

Figure 9. Safe Operating Area

	V_IN = 12 V	V_OUT = 1.2 V

Figure 11. Switching Frequency vs. Output Current

f_SW = 500 kHz	FCCM
V_IN = 12 V

Figure 2. Efficiency vs. Output Current

f_SW = 970 kHz	FCCM
V_IN = 12 V

Figure 4. Efficiency vs. Output Current

f_SW = 970 kHz	V_OUT = 1.2 V

Figure 6. DC Load Regulation

f_SW = 970 kHz	V_OUT = 1.2 V

Figure 8. DC Load Regulation

f_SW = 500 kHz	V_IN = 12 V
V_OUT = 1 V

Figure 10. Safe Operating Area

f_SW = 1 MHz	V_IN = 12 V
V_OUT = 1.2 V	I_LOAD = 0 A

Figure 12. Skip Mode Steady-State Operation

f_SW = 1 MHz	V_IN = 12 V
V_OUT = 1.2 V	I_LOAD = 0.1 A

Figure 14. Skip Mode Steady-State Operation

f_SW = 1 MHz	V_IN = 12 V
V_OUT = 1.2 V	I_LOAD = 8 A

Figure 16. Skip Mode Steady-State Operation

I_LOAD from 0 A to 8 A	Div = 2 A/µs
V_IN = 12 V	V_OUT = 1.2 V
f_SW = 1 MHz

Figure 18. Auto-skip Mode Load Transient

f_SW = 1 MHz	V_IN = 12 V
V_OUT = 1.2 V

Figure 20. Auto-skip Mode Start-Up

I_LOAD = 0 A	V_IN = 12 V
V_OUT = 1.2 V	f_SW = 1 MHz

Figure 22. Skip Mode Pre-Bias Start-Up

I_LOAD = 8A	V_IN = 12 V
V_OUT = 1.2 V	f_SW = 1 MHz

Figure 24. Auto-skip Mode Shutdown Operation

I_LOAD = 0 A	V_IN = 12 V
V_OUT = 1.2 V	f_SW = 1 MHz

Figure 26. FCCM Shutdown Operation

f_SW = 1 MHz	V_IN = 12 V
V_OUT = 1.2 V	I_LOAD = 0 A

Figure 13. FCCM Steady-State Operation

f_SW = 1 MHz	V_IN = 12 V
V_OUT = 1.2 V	I_LOAD = 0.1 A

Figure 15. Steady-State Operation

f_SW = 1 MHz	V_IN = 12 V
V_OUT = 1.2 V	I_LOAD = 8 A

Figure 17. Skip Mode Steady-State Operation

I_LOAD from 0 A to 8 A	Div = 2 A/µs
V_IN = 12 V	V_OUT = 1.2 V
f_SW = 1 MHz

Figure 19. Load Transient

f_SW = 1 MHz	V_IN = 12 V
V_OUT = 1.2 V

Figure 21. FCCM Mode Start-Up

I_LOAD = 0 A	V_IN = 12 V
V_OUT = 1.2 V	f_SW = 1 MHz

Figure 23. FCCM Pre-Bias Start-Up

I_LOAD = 8 A	V_IN = 12 V
V_OUT = 1.2 V	f_SW = 1 MHz

Figure 25. Auto-skip Mode Shutdown Operation

I_LOAD = 8 A	V_IN = 12 V
V_OUT = 1.2 V	f_SW = 1 MHz

Figure 27. FCCM Shutdown Operation

Figure 28. Overcurrent Protection Hiccup

Figure 29. Overcurrent Protection

6.7 Thermal Performance

f_SW = 500 kHz, V_IN= 12 V, V_OUT = 5 V, I_OUT = 12 A, C_OUT = 10 × 22 µF (1206, 6.3 V, X5R), R_BOOT = 0 Ω, SNB = 3 Ω + 470 pF Inductor: L_OUT = 1 µH, PCMC135T-1R0MF, 12.6 mm × 13.8 mm × 5 mm, 2.1 mΩ (typ)

Figure 30. SP1: 68.2℃ ( TPS548A20 ), SP2: 75℃ (Inductor)