SLUSA12 Data sheet

SLUSA12G December 2009 – November 2022 UCC28C40-Q1 , UCC28C41-Q1 , UCC28C42-Q1 , UCC28C43-Q1 , UCC28C44-Q1 , UCC28C45-Q1

PRODUCTION DATA

Package Options

Mechanical Data (Package|Pins)

D|8
- MSOI002K

Thermal pad, mechanical data (Package|Pins)

Orderable Information

7.5 Electrical Characteristics

V_VDD = 15 V⁽¹⁾, R_RT = 10 kΩ, C_CT = 3.3 nF, C_VDD = 0.1 µF and no load on the outputs, T_J = –40°C to 150°C (unless otherwise noted).

PARAMETER		TEST CONDITIONS	MIN	TYP	MAX	UNIT
REFERENCE
V_VREF	VREF voltage, initial accuracy	I_OUT = 1 mA	4.9	5	5.1	V
	Line regulation	V_VDD = 12 V to 18 V		0.2	20	mV
	Load regulation	1 mA to 20 mA		3	25	mV
	Temperature stability	See ⁽²⁾		0.2	0.4	mV/°C
	Total output variation	See ⁽²⁾	4.82		5.18	V
	VREF noise voltage	10 Hz to 10 kHz, T_J = 25°C, see ⁽²⁾		50		µV
	Long term stability	1000 hours, T_J = 125°C, see ⁽²⁾		5	25	mV
I_VREF	Output short circuit (source current)		30	45	55	mA
OSCILLATOR
f_OSC	Initial accuracy	T_J = 25°C, see ⁽³⁾	50.5	53	55	kHz
f_OSC	Initial accuracy	T_J = Full Range, see ⁽³⁾	50.5		57	kHz
	Voltage stability	12 V ≤ V_VDD ≤ 18 V		0.2%	1%
	Temperature stability	T_J(MIN) to T_J(MAX), see ⁽²⁾		1%	2.5%
	Amplitude	RT/CT pin peak-to-peak voltage		1.9		V
	Discharge current	T_J = 25°C, V_RT/CT = 2 V, see ⁽⁴⁾	7.7	8.4	9	mA
	Discharge current	T_J = Full Range, V_RT/CT = 2 V, see ⁽⁴⁾	7.2	8.4	9.5	mA
ERROR AMPLIFIER
V_FB	Feedback input voltage, initial accuracy	T_J = 25°C, V_COMP = 2.5 V	2.475	2.5	2.525	V
	Feedback input voltage, total variation	T_J = Full Range, V_COMP = 2.5 V	2.45	2.5	2.55	V
I_FB	Input bias current (source current)	V_FB = 5 V		0.1	2	µA
A_VOL	Open-loop voltage gain	2 V ≤ V_OUT ≤ 4 V	65	90		dB
	Unity gain bandwidth	See ⁽²⁾	1	1.5		MHz
PSRR	Power supply rejection ratio	12 V ≤ V_VDD ≤ 18 V	60			dB
	Output sink current	V_FB = 2.7 V, V_COMP = 1.1 V	2	14		mA
	Output source current	V_FB = 2.3 V, V_COMP = 5 V	0.5	1		mA
VOH	High-level COMP voltage	V_FB = 2.7 V, R_COMP = 15 kΩ COMP to GND	VREF - 0.2			V
VOL	Low-level COMP voltage	V_FB = 2.7 V, R_COMP = 15 kΩ COMP to VREF		0.1	1.1	V
CURRENT SENSE
A_CS	Gain	T_J = 25°C, See ⁽⁵⁾⁽⁶⁾	2.85	3	3.15	V/V
A_CS	Gain	T_J = Full Range, See ⁽⁵⁾⁽⁶⁾	2.75	3	3.15	V/V
V_CS	Maximum input signal	V_FB < 2.4 V	0.9	1	1.1	V
PSRR	Power supply rejection ratio	V_VDD = 12 V to 18 V⁽²⁾⁽⁵⁾		70		dB
I_CS	Input bias current (source current)			0.1	2	µA
t_D	CS to output delay			35	70	ns
	COMP to CS offset	V_CS = 0 V		1.15		V
OUTPUT
V_OUT(low)	R_DS(on) pulldown	I_SINK = 200 mA		5.5	15	Ω
V_OUT(high)	R_DS(on) pullup	I_SOURCE = 200 mA		10	25	Ω
t_RISE	Rise tIme	C_OUT = 1 nF		25	50	ns
t_FALL	Fall tIme	C_OUT = 1 nF		20	40	ns
UNDERVOLTAGE LOCKOUT
VDD_ON	Start threshold	UCC28C42-Q1, UCC28C44-Q1	13.5	14.5	15.5	V
		UCC28C43-Q1, UCC28C45-Q1	7.8	8.4	9
		UCC28C40-Q1, UCC28C41-Q1	6.5	7	7.5
VDD_OFF	Minimum operating voltage	UCC28C42-Q1, UCC28C44-Q1	8	9	10	V
		UCC28C43-Q1, UCC28C45-Q1	7	7.6	8.2
		UCC28C40-Q1, UCC28C41-Q1	6.1	6.6	7.1
PWM
D_MAX	Maximum duty cycle	UCC28C42-Q1, UCC28C43-Q1, UCC28C40-Q1, V_FB < 2.4 V	94%	96%
D_MAX	Maximum duty cycle	UCC28C44-Q1, UCC28C45-Q1, UCC28C41-Q1, V_FB < 2.4 V	47%	48%
D_MIN	Minimum duty cycle	V_FB > 2.6 V			0%
CURRENT SUPPLY
I_START-UP	Start-up current	V_VDD = VDD_ON – 0.5 V		50	100	µA
I_VDD	Operating supply current	V_FB = V_CS = 0 V		2.3	3	mA

(1) Adjust V_VDD above the start threshold before setting at 15.5 V.

(2) Ensured by design. Not production tested.

(3) Output frequencies of the UCC28C41-Q1, UCC28C44-Q1, and the UCC28C45-Q1 are half the oscillator frequency.

(4) Oscillator discharge current is measured with R_RT = 10 kΩ to VREF.

(5) Parameter measured at trip point of latch with V_FB = 0 V.

(6) Gain is defined as A_CS = ΔV_COMP / ΔV_CS , 0 V ≤ V_CS ≤ 900 mV