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SLUS191D February 1997 – July 2017 UC1525A , UC1527A , UC2525A , UC2527A , UC3525A , UC3527A

PRODUCTION DATA.

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)

J|16
FK|20

散热焊盘机械数据 (封装 | 引脚)

订购信息

6 Specifications

6.1 Absolute Maximum Ratings

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

		MIN	MAX	UNIT
+V_IN	Supply voltage		40	V
V_C	Collector supply voltage		40	V
	Logic inputs	–0.3	5.5	V
	Analog inputs	–0.3	+V_IN	V
	Output current, source or sink		500	mA
	Reference output current		50	mA
	Oscillator charging current		5	mA
	Power dissipation at T_A = +25°C(2)		1000	mW
	Power dissipation at T_C = +25°C(2)		2000	mW
	Operating junction temperature	–55	150	°C
	Lead temperature (soldering, 10 seconds)		300	°C
T_stg	Storage temperature	–65	150	°C

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

6.2 ESD Ratings

			VALUE	UNIT
V_(ESD)	Electrostatic discharge	Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001⁽¹⁾	3000	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
+V_IN	Input voltage		8	35	V
V_C	Collector supply voltage		4.5	35	V
	Sink/source load current (steady state)		0	100	mA
	Sink/source load current (peak)		0	400	mA
	Reference load current		0	20	mA
	Oscillator frequency range		100	400	Hz
	Oscillator timing resistor		2	150	kΩ
	Oscillator timing capacitor		0.001	0.01	µF
	Dead time resistor range		0	500	Ω
	Operating ambient temperature	UC1525A, UC1527A	–55	125	°C
		UC2525A, UC2527A	–25	85
		UC3525A, UC3527A	0	70

6.4 Thermal Information

THERMAL METRIC⁽¹⁾		UCx52xA					UNIT
		FK (LCCC)	J (CDIP)	DW (SOIC)	N (PDIP)	FN (PLCC)
		20 PINS	16 PINS	16 PINS	16 PINS	20 PINS
R_θJA	Junction-to-ambient thermal resistance	N/A	N/A	72.6	47.6	55.8	°C/W
R_θJC(top)	Junction-to-case (top) thermal resistance	32.9	37.4	34	37.3	33.7	°C/W
R_θJB	Junction-to-board thermal resistance	32.1	54.2	37.3	27.7	21.1	°C/W
ψ_JT	Junction-to-top characterization parameter	N/A	N/A	8.9	17.3	9.7	°C/W
ψ_JB	Junction-to-board characterization parameter	N/A	N/A	36.8	27.5	20.8	°C/W
R_θJC(bot)	Junction-to-case (bottom) thermal resistance	3.5	10.1	N/A	N/A	N/A	°C/W

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

6.5 Electrical Characteristics

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

PARAMETER	TEST CONDITIONS		MIN	TYP	MAX	UNIT
REFERENCE
Output voltage	T_J = 25°C	UC152xA, UC252xA	5.05	5.1	5.15	V
Output voltage	T_J = 25°C	UC352xA	5	5.1	5.2	V
Line regulation	V_IN = 8 V to 35 V			10	20	mV
Load regulation	I_L = 0 mA to 20 mA			20	50	mV
Temperature stability⁽¹⁾	Over operating			20	50	mV
Total output variation⁽¹⁾	Line, load, and temperature	UC152xA, UC252xA	5		5.2	V
Total output variation⁽¹⁾	Line, load, and temperature	UC352xA	4.95		5.25	V
Shorter circuit current	V_REF = 0, T_J = 25°C			80	100	mA
Output noise Voltage⁽¹⁾	10 Hz ≤ 10 kHz, T_J = 25°C			40	200	µVrms
Long-term stability⁽¹⁾	T_J = 125°C			20	50	mV
OSCILLATOR SECTION⁽²⁾
Initial accuracy⁽¹⁾⁽²⁾	T_J = 25°C			2%	6%
Voltage stability⁽¹⁾⁽²⁾	V_IN = 8 V to 35 V	UC152xA, UC252xA		0.3%	1%
Voltage stability⁽¹⁾⁽²⁾	V_IN = 8 V to 35 V	UC352xA		1%	2%
Temperature stability⁽¹⁾	Over operating			3%	6%
Minimum frequency	R_T = 200 kΩ, C_T = 0.1 mF				120	Hz
Maximum frequency	R_T = 2 kΩ, C_T = 470 pF		400			kHz
Current mirror	I_RT = 2 mA		1.7	2	2.2	mA
Clock amplitude⁽¹⁾⁽²⁾			3	3.5		V
Clock width⁽¹⁾⁽²⁾	T_J = 25°C		0.3	0.5	1	µs
Syncronization threshold⁽¹⁾⁽²⁾			1.2	2	2.8	V
Sync input current	Sync voltage = 3.5 V			1	2.5	mA
ERROR AMPLIFIER SECTION (V_CM = 5.1 V)
Input offset voltage	UC152xA, UC252xA			0.5	5	mV
Input offset voltage	UC352xA			2	10
Input bias current				1	10	µA
Input offset current					1	µA
DC open loop gain	R_L ≥ 10 MΩ		60	75		dB
Gain-bandwidth product⁽¹⁾	A_V = 0 dB, T_J = 25°C		1	2		MHz
DC transconductance⁽¹⁾⁽³⁾	T_J = 25°C, 30 kΩ ≤ R_L ≤ 1 MΩ		1.1	1.5		mS
Low-level output voltage				0.2	0.5	V
High-level output voltage			3.8	5.6		V
Common mode rejection	V_CM = 1.5 V to 5.2 V		60	75		dB
Supply voltage rejection	V_IN = 8 V to 35 V		50	60		dB
PWM COMPARATOR
Minimum duty-cycle					0%
Maximum duty-cycle			45%	49%
Input threshold⁽⁴⁾	Zero duty-cycle		0.7	0.9		V
Input threshold⁽⁴⁾	Maximum duty-cycle			3.3	3.6	V
Input bias current⁽⁴⁾				0.05	1	µA
SHUTDOWN
Soft-start current	V_SD = 0 V, V_SS = 0 V		25	50	80	µA
Soft-start low level	V_SD = 2.5 V			0.4	0.7	V
Shutdown threshold	To outputs, V_SS = 5.1 V, T_J = 25°C		0.6	0.8	1	V
Shutdown input current	V_SD = 2.5 V			0.4	1	mA
Shutdown Delay⁽⁵⁾	V_SD = 2.5 V, T_J = 25°C			0.2	0.5	µS
OUTPUT DRIVERS (EACH OUTPUT) (V_C = 20 V)
Low-level output voltage	I_SINK = 20 mA			0.2	0.4	V
Low-level output voltage	I_SINK = 100 mA			1	2	V
High-level output voltage	I_SOURCE = 20 mA		18	19		V
High-level output voltage	I_SOURCE = 100 mA		17	18		V
Undervoltage lockout	V_COMP and V_SS = High		6	7	8	V
V_C OFF current⁽⁶⁾	V_C = 35 V				200	µA
Rise time⁽⁵⁾	C_L = 1 nF, T_J = 25°C			100	600	ns
Fall time⁽⁵⁾	C_L = 1 nF, T_J = 25°C			50	300	ns
TOTAL STANDBY CURRENT
Supply current	V_IN = 35 V			14	20	mA

(1) These parameters, although ensured over the recommended operating conditions, are not 100% tested in production.

(2) Tested at f_OSC = 40 kHz (R_T = 3.6 kΩ, C_T = 0.01 mF, R_D = 0. Approximate oscillator frequency is defined by UC1525A UC1527A UC2525A UC2527A UC3525A UC3527A Equation1.gif

UC1525A UC1527A UC2525A UC2527A UC3525A UC3527A Equation1.gif

(3) DC transconductance (g_M) relates to DC open-loop voltage gain (A_V) according to the following equation: A_V = gMRL where R_L is the resistance from pin 9 to ground. The minimum g_M specification is used to calculate minimum A_V when the error amplifier output is loaded.

(4) Tested at f_OSC = 40 kHz (R_T = 3.6 kΩ, C_T = 0.01 mF, R_D = 0 Ω.

(5) These parameters, although ensured over the recommended operating conditions, are not 100% tested in production.

(6) Collector off-state quiescent current measured at pin 13 with outputs low for UC1525A and high for UC1527A.

6.6 Typical Characteristics

UC1525A UC1527A UC2525A UC2527A UC3525A UC3527A D002_SLUS191.gif

Figure 1. Oscillator Charge Time vs R_T and C_T

UC1525A UC1527A UC2525A UC2527A UC3525A UC3527A D004_SLUS191.gif

Figure 3. Maximum Value R_D vs Minimum Value R_T

UC1525A UC1527A UC2525A UC2527A UC3525A UC3527A D003_SLUS191.gif

Figure 2. Oscillator Discharge Time vs R_T C_T

UC1525A UC1527A UC2525A UC2527A UC3525A UC3527A D005_SLUS191.gif

Figure 4. Error Amplifier Voltage Gain and Phase vs Frequency