ZHCSRU8 数据表 | 德州仪器 TI.com.cn

ZHCSRU8 February 2024

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MOY|45
- MPQF759

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zhcsru8_oa

5.5 Electrical Characteristics

T_J = –40°C to 125°C, V_PVIN = V_AVIN= 12V, f_SW = 550kHz; zero power dissipation (unless otherwise noted)

PARAMETER		TEST CONDITIONS		MIN	TYP	MAX	UNIT
INPUT SUPPLY
V_AVIN	Input supply voltage range	Controller input voltage with internal LDO		4.25		18	V
V_AVIN	Input supply voltage range	Controller input voltage with valid external bias		2.95		18
V_PVIN	Power stage voltage range	Power stage input voltage with internal LDO		4.25		16
V_PVIN	Power stage voltage range	Power stage input voltage with valid external bias		2.95		16
I_AVIN	Input operating current	Converter not switching, each phase			12.5	17	mA
AVIN UVLO
V_AVINuvlo	Analog input voltage UVLO for power on reset (PMBus communication)	Enable threshold			2.5	2.7	V
	Analog input voltage UVLO for disable			2.09	2.3		V
	Analog input voltage UVLO hysteresis				250		mV
t_{delay(uvlo_PMBus)}	Delay from AVIN UVLO to PMBus ready to communicate	AVIN = 3 V			8		ms
PVIN UVLO
VIN_ON	Power input turn-on voltage	Factory default setting			2.75		V
		Programmable range		2.75		15.75
		Resolution			0.25
		Accuracy		–5%		5%
VIN_OFF	Power input turn-off voltage	Factory default setting			2.5		V
		Programmable range		2.5		15.5
		Resolution			0.25
		Accuracy		–5%		5%
ENABLE AND UVLO
V_ENuvlo	EN/UVLO voltage rising threshold				1.05	1.1	V
V_ENuvlo	EN/UVLO voltage falling threshold			0.9
V_ENhys	EN/UVLO voltage hysteresis	No external resistors on EN/UVLO			70		mV
I_ENhys		V_EN/UVLO = 1.1V		4.5	5.5	6.5	uA
I_ENhys		V_EN/UVLO = 0.9V			-100	-5	nA
REMOTE SENSE AMPLIFIER
Z_RSA	Remote sense input impedance	VOSNS – GOSNS = 1V	VOSNS to GOSNS	85	130	165	kΏ
V_IRNG(GOSNS)	GOSNS input range for regulation accuracy ⁽¹⁾	VOSNS – GOSNS = 1V, VOUT_SCALE_LOOP ≤ 0.5		–0.05		0.05	V
V_IRNG(VOSNS)	VOSNS input range for regulation accuracy ⁽¹⁾	GOSNS = AGND, VOUT_SCALE_LOOP ≤ 0.5		–0.1		5.5	V
REFERENCE VOLTAGE AND ERROR AMPLIFIER
V_REF	Reference voltage⁽¹⁾	Default setting			0.4		V
		Reference voltage range⁽¹⁾		0.25		0.75	V
		Reference voltage resolution⁽¹⁾			2^–12		V
V_OUT(ACC)	Output voltage accuracy	V_OUT = 1000mV	–40°C ≤ T_J ≤ 150°C⁽²⁾	0.992		1.008	V
		V_OUT = 500mV		0.492		0.508	V
		V_OUT = 1500mV		1.490		1.510	V
		V_OUT = 1000mV	0°C ≤ T_J ≤ 125°C⁽²⁾	0.994		1.006	V
		V_OUT = 500mV		0.494		0.506	V
		V_OUT = 1500mV		1.492		1.508	V
		V_OUT = 1000mV	0°C ≤ T_J ≤ 85°C⁽²⁾	0.995		1.005	V
		V_OUT = 500mV		0.495		0.505	V
		V_OUT = 1500mV		1.493		1.507	V
G_mEA	Programmable error amplifier transonductance			25		200	µS
	Resolution⁽¹⁾	Four settings: 25μS, 50μS, 100μS, 200μS			25		µS
	Unloaded bandwidth⁽¹⁾				8		MHz
R_pEA	Programmable parallel resistor range			5		315	kΩ
R_pEA	Resolution⁽¹⁾				5		kΩ
C_intEA	Programmable integrator capacitor range			1.25		18.75	pF
C_intEA	Resolution⁽¹⁾				1.25		pF
C_pEA	Programmable parallel capacitor range			6.25		193.75	pF
C_pEA	Resolution⁽¹⁾				6.25		pF
CURRENT GM AMPLIFIER
G_mBUF	Programmable current error amplifier transonductance			25		200	µS
	Resolution⁽¹⁾	Four settings: 25µS, 50µS, 100µS, 200µS			25		µS
	Unloaded bandwidth⁽¹⁾				17		MHz
R_pBUF	Programmable parallel resistor range			5		315	kΩ
R_pBUF	Resolution⁽¹⁾				5		kΩ
R_intBUF	Programmable integrator resistor range⁽¹⁾			800		1600	kΩ
R_intBUF	Resolution⁽¹⁾				800		kΩ
C_intBUF	Programmable integrator capacitor range			0.3125		4.6875	pF
C_intBUF	Resolution⁽¹⁾				0.3125		pF
C_pBUF	Programmable parallel capacitor range			3.125		96.875	pF
C_pBUF	Resolution⁽¹⁾				3.125		pF
OSCILLATOR
f_SW	Adjustment range⁽²⁾			275		1100	kHz
f_SW	Switching frequency⁽²⁾			500	550	600	kHz
SYNCHRONIZATION
V_IH(sync)	High-level input voltage			1.35			V
V_IL(sync)	Low-level input voltage					0.8	V
t_pw(sync)	Sync input minimum pulse width					200	ns
Δf_SYNC	SYNC pin frequency range from FREQUENCY_SWITCH frequency⁽¹⁾			–20%		20%
V_OH(sync)	Sync output high voltage	100μA load		VDD5 -0.85V		VDD5	V
V_OL(sync)	Sync output low voltage	2.4mA load				0.4	V
t_PLL	PLL lock time	F_sw = 550kHz, SYNC clock frequency 495kHz–605kHz⁽¹⁾				65	μs
PhaseErr	Phase interleaving error⁽⁵⁾	f_sw < 1.1MHz				9	Degree
PhaseErr	Phase interleaving error⁽⁵⁾	f_sw ≥1.1MHz				23	ns
RESET
V_IH(reset)	High-level input voltage⁽¹⁾			1.35			V
V_IL(reset)	Low-level input voltage					0.8	V
t_pw(reset)	Minimum RESET_B pulse width					200	ns
R_{pullup(reset)}	Internal pullup resistance	V_RESET = 0.8V	RESET# = 1	25	34	55	kΩ
V_{pullup(reset)}	Internal pullup voltage	I_RESET = 10μA	RESET# = 1			VDD5 – 0.5	V
VDD5 REGULATOR
V_VDD5	Regulator output voltage	Default, I_VDD5 = 10mA		4.5	4.7	4.9	V
	Programmable range⁽¹⁾			3.9		5.3	V
	Resolution				200		mV
V_VDD5(do)	Regulator dropout voltage	V_AVIN – V_VDD5, V_AVIN = 4.5 V, I_VDD5 = 25mA			130	285	mV
V_VDD5ON(IF)	Enable voltage on VDD5 for pin-strapping				2.62	2.85	V
V_VDD5OFF(IF)	Disable voltage on VDD5 for pin-strapping			2.25	2.48		V
V_VDD5ON(SW)	Switching enable voltage upon VDD5					4.05	V
V_VDD5OFF(SW)	Switching disable voltage upon VDD5			3.10			V
V_VDD5UV(hyst)	Regulator UVLO voltage hysteresis			400			mV
V_BOOT(drop)	Bootstrap voltage drop	I_BOOT = 20mA, VDD5 = 4.5V				225	mV
BP1V5 REGULATOR
V_BP1V5	1.5V regulator output voltage	V_AVIN ≥ 4.5V, I_BP1V5 = 5mA		1.42	1.5	1.58	V
I_BP1V5SC	1.5V regulator short-circuit current⁽¹⁾			30			mA
PWM
t_ON(min)	Minimum controllable pulse width⁽¹⁾					20	ns
t_OFF(min)	PWM Minimum off time⁽¹⁾				400	500	ns
SOFT START
t_{ON_RISE}	Soft-start time	Factory default setting			3		ms
		Programmable range⁽¹⁾⁽³⁾		0		31.75
		Resolution			0.25
		Accuracy, TON_RISE = 3ms		–10%		15%
t_{ON_MAX_FLT_LT}	Upper limit on the time to power up the output	Factory default setting⁽⁴⁾			0		ms
		Programmable range⁽¹⁾⁽⁴⁾		0		127.5
		Resolution			0.5
		Accuracy⁽¹⁾		–10%		15%
t_{ON_DELAY}	Turn-on delay	Factory default setting			0		ms
		Programmable range⁽¹⁾		0		127.5
		Resolution			0.5
		Accuracy⁽¹⁾		–10%		15%
SOFT STOP
t_{OFF_FALL}	Soft-stop time	Factory default setting⁽³⁾			0.5		ms
		Programmable range^⁽¹⁾⁽³⁾		0		31.75
		Resolution			0.25
		Accuracy, TOFF_FALL = 1ms		–10%		15%
t_{OFF_DELAY}	Turn-off delay	Factory default setting			0		ms
		Programmable range⁽¹⁾		0		127.5
		Resolution			0.5
		Accuracy⁽¹⁾		–10%		15%
POWER STAGE
R_HS	High-side power device on-resistance	V_BOOT - V_SW = 4.5V, T_J = 25°C			4.5		mΩ
R_LS	Low-side power device on-resistance	V_VDD5 = 4.5V, T_J = 25°C			0.9		mΩ
R_swpd	SW internal pulldown resistance			3	30	35	kΩ
V_wkdr(on)	Weak high-side gate drive triggering threshold upon PVIN rising				14.75		V
V_wkdr(off)	Weak high-side gate drive recovering threshold upon PVIN falling				14.35		V
t_DEAD(LtoH)	Power stage driver dead-time from low-side off to high-side on	V_VDD5 = 4.5V, T_J = 25°C⁽¹⁾			6		ns
t_DEAD(HtoL)	Power stage driver dead-time from high-side off to low-side on	V_VDD5 = 4.5V, T_J = 25°C⁽¹⁾			6		ns
CURRENT SHARING
I_SHARE(acc)	Output current sharing accuracy of two devices defined as the ratio of the current difference between two devices to the sum of the two	I_OUT ≥ 10A per device⁽⁵⁾		–10%		10%	A
I_SHARE(acc)	Output current sharing accuracy of two devices defined as the current difference between each device and the average of all devices	I_OUT < 10A per device⁽⁵⁾		–1		1	A
V_VSHARE	VSHARE fault trip threshold				0.1		V
V_VSHARE	VSHARE fault release threshold				0.2		V
LOW-SIDE CURRENT LIMIT PROTECTION
t_OFF(OC)	Off time between restart attempts⁽¹⁾	Factory default setting			7 × t_{ON_RISE}		ms
t_OFF(OC)	Range			1 × t_{ON_RISE}		7 × t_{ON_RISE}	ms
IO_OC_FLT_LMT	Output current overcurrent fault threshold	Factory default setting			52		A
		Programmable range		8		62
		Resolution			2
I_NEGOC	Negative output current overcurrent protection threshold				–20
I_OC(acc)	Output current overcurrent fault error	I_OUT = 20A		–2		4	A
I_OC(acc)	Output current overcurrent fault error	I_OUT = 25A⁽⁵⁾		–4		8	A
I_HSOC	Output current overcurrent fault accuracy	I_OUT = 10A		–1		2	A
I_HSOC	Output current overcurrent fault accuracy	I_OUT = 20A⁽⁵⁾		–2		4	A
HIGH-SIDE SHORT CIRCUIT PROTECTION
I_HSOC	Ratio of high-side short-circuit protection fault threshold over low-side overcurrent limit	T_J = 25°C⁽⁵⁾		105%	150%	200%
I_HSOC	High-side current sense blanking time				100		ns
POWER GOOD (PGOOD) AND OVERVOLTAGE/UNDERVOLTAGE WARNING
R_PGD	PGD pulldown resistance	I_PGD = 5mA			30	50	Ω
I_PGD(OH)	Output high open drain leakage current into PGD pin	V_PGD = 5V				15	µA
V_PGD(OL)	PGD pin output low level voltage at no supply voltage	V_AVIN= 0, I_PGD = 80μA				0.8	V
V_OVW	Overvoltage warning threshold (PGD threshold on VOSNS rising)	Factory default, at VOUT_COMMAND (VOC) = 1V		106%	110%	114%	VOC
	Range			103%		116%
	Resolution				1%
V_UVW	Undervoltage warning threshold (PGD threshold on VOSNS falling)	Factory default, at VOUT_COMMAND (VOC) = 1V		86%	90%	94%
	Range			84%		97%
	Resolution				1%
V_PGD(rise)	PGD release threshold on VOSNS rising and undervoltage warning de-assertion threshold	Factory default, at VOUT_COMMAND (VOC) = 1V			95%
V_PGD(fall)	PGD threshold on VOSNS falling and overvoltage warning de-assertion threshold	Factory default, at VOUT_COMMAND (VOC) = 1V			105%
OUTPUT OVERVOLTAGE AND UNDERVOLTAGE FAULT PROTECTION
V_OVF	Overvoltage fault threshold	Factory default, at VOUT_COMMAND (VOC) = 1V	Factory default, at VOUT_COMMAND (VOC) = 1V	111%	115%	119%	VOC
	Range	Factory default, at VOUT_COMMAND (VOC) = 1V	Factory default, at VOUT_COMMAND (VOC) = 1V	105%		140%
	Resolution	Factory default, at VOUT_COMMAND (VOC) = 1V	Factory default, at VOUT_COMMAND (VOC) = 1V		2.5%
V_UVF	Undervoltage fault threshold	Factory default, at VOUT_COMMAND (VOC) = 1V	Factory default, at VOUT_COMMAND = 1.00V	81%	85%	89%
	Range	Factory default, at VOUT_COMMAND = 1.00V	Factory default, at VOUT_COMMAND = 1.00V	60%		95%
	Resolution	Factory default, at VOUT_COMMAND = 1.00V	Factory default, at VOUT_COMMAND = 1.00V		2.5%
V_OVF(fix)OFF	Fixed overvoltage fault threshold	Factory default, at VOUT_COMMAND (VOC) = 1V	Factory default, at VOUT_COMMAND = 1.00V	1.15	1.2	1.25	V
V_OVF(fix)OFF	Recovery threshold⁽¹⁾	Factory default, at VOUT_COMMAND = 1.00V	Factory default, at VOUT_COMMAND = 1.00V		0.4		V
OUTPUT VOLTAGE TRIMMING
V_OUTRES		Default resolution of VOUT_COMMAND, trim and margin, VOUT_SCALE_LOOP = 0.5		1.90	1.95	2.00	mV
V_OUTRES		Programmable range⁽¹⁾		2^–12		2^–5	V
VOUT_TRAN_RT	Output voltage transition rate	Factory default setting			1		mV/µs
		Programmable range⁽¹⁾		0.063		15.933	mV/µs
		Accuracy		–10%		10%
VOUT_SCL_LP	Feedback loop scaling factor⁽¹⁾	Factory default setting			0.5
VOUT_SCL_LP	Feedback loop scaling factor⁽¹⁾	Programmable range, four discrete settings		0.125		1
VOUT_CMD	Output voltage programmable values	Factory default setting			0.8		V
		Programmable range	VOUT_SCALE_LOOP = 1 ⁽⁵⁾	0.25		0.75	V
			VOUT_SCALE_LOOP = 0.5	0.25		1.5
			VOUT_SCALE_LOOP = 0.25⁽⁵⁾	0.25		3
			VOUT_SCALE_LOOP = 0.125⁽⁵⁾	0.25		3.6
TEMPERATURE SENSE AND THERMAL SHUTDOWN
T_SD	Bandgap thermal shutdown temperature⁽¹⁾			150	170		°C
T_HYST	Bandgap thermal shutdown hysteresis⁽¹⁾					25
OT_FLT_LMT	Internal overtemperature fault limit⁽¹⁾	Factory default setting			150
		Programmable range		0		160
		Resolution			1
OT_WRN_LMT	Internal overtemperature warning limit⁽¹⁾	Factory default setting			125
		Programmable range		0		160
		Resolution			1
T_OT(hys)	Internal overtemperature fault, warning hysteresis⁽¹⁾	Factory default setting				25
MEASUREMENT SYSTEM
M_VOUT(rng)	Output voltage measurement range⁽¹⁾			0		6	V
M_VOUT(acc)	Output voltage measurement accuracy	250mV < V_OUT < 6V		–2%		2%
M_VOUT(lsb)	Output voltage measurement bit resolution⁽¹⁾				244		µV
M_IOUT(rng)	Output current measurement range⁽¹⁾			–5		30	A
M_IOUT(acc)	Output current measurement accuracy⁽⁵⁾	I_OUT ≤ 5A, T_J = 25°C		–1	0	1	A
M_IOUT(acc)	Output current measurement accuracy⁽⁵⁾	I_OUT = 10A, –40°C ≤ T_J ≤ 150°C		–1.5	0	1.5	A
M_IOUT(acc)	Output current measurement accuracy⁽⁵⁾	I_OUT = 20A, –40°C ≤ T_J ≤ 150°C		–2	0	2	A
M_IOUT(acc)	Output current measurement accuracy⁽⁵⁾	I_OUT = 10A, 0°C ≤ T_J ≤ 85°C		–1.3	0	1.3	A
M_IOUT(acc)	Output current measurement accuracy⁽⁵⁾	I_OUT = 20A, 0°C ≤ T_J ≤ 85°C		–1.5	0	1.5	A
M_IOUT(lsb)	Output current measurement bit resolution⁽¹⁾				2^–6		A
M_PVIN(rng)	Input voltage measurement range⁽¹⁾			0		20	V
M_PVIN(acc)	Input voltage measurement accuracy	4V< PVIN < 20V		–3%		3%
M_TSNS(acc)	Internal temperature sense accuracy⁽⁵⁾	–40°C ≤ T_J ≤ 150°C		–3		3	°C
M_TSNS(lsb)	Internal temperature sense bit resolution⁽¹⁾				0.25		°C
PMBUS INTERFACE + BCX
V_IH(PMBUS)	High-level input voltage on PMB_CLK, PMB_DATA, BCX_CLK, BCX_DAT			1.35			V
V_IL(PMBUS)	Low-level input voltage on PMB_CLK, PMB_DATA, BCX_CLK, BCX_DAT					0.8	V
I_lH(PMBUS)	Input high level current into PMB_CLK, PMB_DATA			–10		10	μA
I_IL(PMBUS)	Input low level current into PMB_CLK, PMB_DATA			–10		10	μA
V_OL(PMBUS)	Output low level voltage on PMB_DATA, SMB_ALRT, BCX_DAT	V_AVIN > 4.5V, input current to PMB_DATA, SMB_ALRT, BCX_DAT = 20mA				0.4	V
I_OH(PMBUS)	Output high level open-drain leakage current into PMB_DATA, SMB_ALRT	Voltage on PMB_DATA, SMB_ALRT = 5.5V				10	μA
I_OL(PMBUS)	Output low level open-drain sinking current on PMB_DATA, SMB_ALRT, BCX_DAT	Voltage on PMB_DATA, SMB_ALRT, BCX_DAT = 0.4V		20			mA
f_{PMBUS_CLK}	PMBus operating frequency range	GOSNS = AGND		10		1000	kHz
C_PMBUS	PMBUS_CLK and PMBUS_DATA pin input capacitance⁽¹⁾	V_pin = 0.1V to 1.35V				5	pF
N_{WR_NVM}	Number of NVM writable cycles⁽¹⁾	–40°C to 150°C		1000			cycle
t_{CLK_STCH(max)}	Maximum allowable clock stretch⁽¹⁾					6	ms

(1) Specified by design. Not production tested.

(2) The parameter covers 2.95V to 18V of AVIN.

(3) The setting of TON_RISE and TOFF_FALL of 0ms means the unit to bring its output voltage to the programmed regulation value of down to 0 as quickly as possible, which results in an effective TON_RISE and TOFF_FALL time of 0.5ms (fastest time supported).

(4) The setting of TON_MAX_FAULT_LIMIT and TOFF_MAX_WARN_LIMIT of 0 means disabling TON_MAX_FAULT and TOFF_MAX_WARN response and reporting completely.

(5) Not production tested.