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SNVS506J May 2008 – December 2015 LM3691

PRODUCTION DATA.

封裝選項

機械數據 (封裝 | 引腳)

YZR|6
- MXBG269

散熱焊盤機械數據 (封裝 | 引腳)

訂購信息

7 Specifications

7.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)⁽¹⁾⁽²⁾

	MIN	MAX	UNIT
VIN pin to GND	−0.2	6	V
EN, MODE, FB, SW pins	(GND − 0.2)	V_IN + 0.2	V
Junction temperature (T_J-MAX)		150	°C
Continuous power dissipation⁽³⁾	Internally Limited
Maximum lead temperature (soldering, 10 seconds)		260	°C
Storage temperature, T_stg		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.

(2) If Military/Aerospace specified devices are required, contact the TI Sales Office/Distributors for availability and specifications.

(3) Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T_J = 150°C (typical) and disengages at T_J = 130°C (typical).

7.2 ESD Ratings

			VALUE	UNIT
V_(ESD)	Electrostatic discharge	Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001⁽¹⁾	±2000	V
V_(ESD)	Electrostatic discharge	Machine model	±200	V

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

7.3 Recommended Operating Conditions

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

	MIN	MAX	UNIT
Input voltage	2.3	5.5	V
Recommended load current	0	1000	mA
Junction temperature, T_J	−30	125	°C
Ambient temperature, T_A⁽¹⁾	−30	85	°C

(1) In applications where high power dissipation and/or poor package resistance is present, the maximum ambient temperature may have to be derated. Maximum ambient temperature (T_A-MAX) is dependent on the maximum operating junction temperature (T_J-MAX), the maximum power dissipation of the device in the application (P_D-MAX) and the junction to ambient thermal resistance of the package (R_θJA) in the application, as given by the following equation: T_A-MAX = T_J-MAX − (R_θJA × P_D-MAX). Due to the pulsed nature of testing the part, the temp in Electrical Characteristics is specified as T_A = T_J.

7.4 Thermal Information

THERMAL METRIC⁽¹⁾		LM3691	UNIT
		YZR (DSBGA)
		6 PINS
R_θJA	Junction-to-ambient thermal resistance⁽²⁾	85	°C/W

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

(2) Junction-to-ambient thermal resistance is highly application and board layout dependent. In applications where high power dissipation exists, special care must be given to thermal dissipation issues in board design.

7.5 Electrical Characteristics

Unless otherwise specified, specifications apply to the LM3691 open-loop Typical Application Circuit with V_IN = EN = 3.6 V; typical limits are for T_A = 25°C and minimum and maximum limits apply over the operating ambient temperature range (−30°C ≤ T_A = T_J ≤ +85°C).⁽¹⁾⁽²⁾⁽³⁾

PARAMETER		TEST CONDITIONS	MIN	TYP	MAX	UNIT
V_FB	Feedback voltage	PWM mode no load V_OUT = 1.1 V to 3.3 V	–1%		1%
V_FB	Feedback voltage	PWM mode no load V_OUT = 0.75 V to 1 V	–10		10	mV
I_SHDN	Shutdown supply current	EN = 0 V		0.03	1	µA
I_{Q_ECO}	ECO mode I_Q	ECO mode		64	80	µA
I_{Q_PWM}	PWM mode I_Q	PWM mode		490	600	µA
R_{DSON (P)}	Pin-pin resistance for PFET	V_IN = V_GS = 3.6 V, I_O = 200 mA		160	250	mΩ
R_{DSON (N)}	Pin-pin resistance for NFET	V_IN = V_GS = 3.6 V, I_O = −200 mA		115	180	mΩ
I_LIM	Switch peak current limit	Open loop	1250	1500	1700	mA
V_IH	Logic high input		1.2			V
V_IL	Logic low input				0.4	V
I_EN,MODE	Input current			0.01	1	µA
F_SW	Switching frequency	PWM mode	3.6	4	4.4	MHz
V_ON	UVLO threshold⁽⁴⁾	V_IN rising, T_A = 25°C		2.2	2.29	V
V_ON	UVLO threshold⁽⁴⁾	V_IN falling		2.1		V
T_STARTUP	Start time⁽⁵⁾	T_A = 25°C	70	145	300	µs

(1) All voltages are with respect to the potential at the GND pin.

(2) Minimum and maximum limits are specified by design, test or statistical analysis. Typical numbers represent the most likely norm.

(3) The parameters in the electrical characteristic table are tested under open-loop conditions at V_IN = 3.6 V unless otherwise specified. For performance over the input voltage range and closed loop condition, refer to the datasheet curves.

(4) The UVLO rising threshold minus the falling threshold is always positive.

(5) Specified by design. Not production tested.

7.6 Typical Characteristics

LM3691TL Typical Application Circuit, V_IN = 3.6 V, V_OUT = 1.8 V, T_A = 25°C, L = 1 μH, 2520, (LQM2HP1R0), C_IN = C_OUT = 4.7 μF, 0603(1608), 6.3 V, (C1608X5R0J475K) unless otherwise noted.

Figure 1. Quiescent Supply Current vs Supply Voltage No Switching, ECO Mode

V_OUT = 1.8 V

Figure 3. Shutdown Current vs Temperature

V_OUT = 0.75 V

Figure 5. Output Voltage vs Supply Voltage

V_OUT = 0.75 V

Figure 7. Output Voltage vs Output Current

V_OUT = 0.75 V

Figure 9. Input Current vs Output Current

V_OUT = 0.75 V

Figure 11. Efficiency vs, Output Current, ECO Mode

V_OUT = 2.5 V

Figure 13. Efficiency vs Output Current, ECO Mode

V_OUT = 1.8 V

Figure 15. Efficiency vs Output Current, FPWM Mode

V_OUT = 0.75 V

Figure 17. Load Current Threshold vs Supply Voltage, ECO Mode to PWM Mode

V_OUT = 0.75 V

Figure 19. Output Voltage Ripple vs Supply Voltage

V_OUT = 0.75 V

Figure 21. Closed Loop Current Limit vs Temperature

V_OUT = 0.75 V

Figure 23. Line Transient Reponse, PWM Mode

V_OUT = 0.75 V

ECO Mode 1 mA to 25 mA

Figure 25. Load Transient Reponse

V_OUT = 1.8 V

ECO Mode 1 mA to 25 mA

Figure 27. Load Transient Reponse

V_OUT = 0.75 V

ECO Mode to PWM Mode

Figure 29. Load Transient Reponse

V_OUT = 1.8 V

ECO Mode to PWM Mode

Figure 31. Load Transient Reponse

V_OUT = 2.5 V

ECO Mode to PWM Mode

Figure 33. Load Transient Reponse

V_OUT = 0.75 V

PWM Mode

Figure 35. Load Transient Reponse

V_OUT = 2.5 V	PWM Mode

Figure 37. Load Transient Reponse

V_OUT = 0.75 V

R_OUT = 2.5 Ω

Figure 39. Start-Up Into PWM Mode

V_OUT = 1.8 V

R_OUT = 6 Ω

Figure 41. Start-Up Into PWM Mode

Figure 2. Quiescent Supply Current vs Supply Voltage No Switching, PWM Mode

V_OUT = 1.8 V

Figure 4. Switching Frequency vs Temperature, PWM Mode

V_OUT = 1.8 V

Figure 6. Output Voltage vs Supply Voltage

V_OUT = 1.8 V

Figure 8. Output Voltage vs Output Current

V_OUT = 1.8 V

Figure 10. Input Current vs Output Current

V_OUT = 1.8 V

Figure 12. Efficiency vs Output Current, ECO Mode

V_OUT = 0.75 V

Figure 14. Efficiency vs Output Current, FPWM Mode

V_OUT = 2.5 V

Figure 16. Efficiency vs Output Current, FPWM Mode

V_OUT = 1.8 V

Figure 18. Load Current Threshold vs Supply Voltage, ECO Mode to PWM Mode

V_OUT = 1.8 V

Figure 20. Output Voltage Ripple vs Supply Voltage

V_OUT = 1.8 V

Figure 22. Closed Loop Current Limit vs Temperature

V_OUT = 1.8 V

Figure 24. Line Transient Reponse, PWM Mode

V_OUT = 0.75 V

ECO Mode 25 mA to 1 mA

Figure 26. Load Transient Reponse

V_OUT = 1.8 V

ECO Mode 25 mA to 1 mA

Figure 28. Load Transient Reponse

V_OUT = 0.75 V

PWM Mode to ECO Mode

Figure 30. Load Transient Reponse

V_OUT = 2.5 V	ECO Mode to PWM Mode

Figure 32. Load Transient Response

V_OUT = 1.8 V

FPWM Mode

Figure 34. Load Transient Reponse

V_OUT = 1.8 V	PWM Mode

Figure 36. Load Transient Reponse

V_OUT = 0.75 V

R_OUT = 750 Ω

Figure 38. Start-Up Into ECO Mode

V_OUT = 1.8 V

R_OUT = 1.8 kΩ

Figure 40. Start-Up Into ECO Mode