2A, 36V Step-Down µ Regulator FEATURES …

1 LTM8023. 2A, 36V DC/DC. Step-Down Module Regulator FEATURES DESCRIPTION. n Complete Step-Down Switch Mode Power Supply The LTM 8023 is a complete 2A, DC/DC Step-Down power n Wide Input Voltage Range: to 36V supply. Included in the package are the switching controller, n 2A Output Current power switches, inductor, and all support components. n to 10V Output Voltage Operating over an input voltage range of to 36V, the n Selectable Switching Frequency: 200kHz to LTM8023 supports an output voltage range of to 10V, n Current Mode Control and a switching frequency range of 200kHz to , n Programmable Soft-Start each set by a single resistor. Only the bulk input and output n SnPb (BGA) or RoHS Compliant (LGA and BGA) filter capacitors are needed to finish the design. Finish n Tiny, Low Profile, Surface Mount LGA (9mm . The low profile package enables utilization of unused space on the bottom of PC boards for high density point ) and BGA (9mm.)

2 Of load regulation. ) Packages The LTM8023 is packaged in a thermally enhanced, com- pact and low profile over-molded land grid array (LGA). APPLICATIONS and ball grid array (BGA) packages suitable for automated n Automotive Battery Regulation assembly by standard surface mount equipment. The n Power for Portable Products LTM8023 is available with SnPb (BGA) or RoHS compli- n Distributed Supply Regulation ant terminal finish. n Industrial Supplies L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and Module are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their n Wall Transformer Regulation respective owners. TYPICAL APPLICATION. to 36 VIN, DC/DC Module Converter Efficiency and Power Loss 90 VOUT. VIN* 85 VIN VOUT TO 36V. 2A. F AUX 22 F 80. RUN/SS BIAS POWER LOSS (W). EFFICIENCY (%).

3 75. SHARE. LTM8023 70. PGOOD 65. 60. ADJ SELECTABLE 55 VIN = 12V. VOUT = OPERATING RT GND SYNC. FREQUENCY 8023 TA01. 50 f = 650 kHz 0. 154k 1 10. LOAD CURRENT (A). 8023 TA01b *RUNNING VOLTAGE RANGE. PLEASE. REFER TO APPLICATIONS INFORMATION. FOR START-UP DETAILS. 8023fj For more information 1. LTM8023. ABSOLUTE MAXIMUM RATINGS. (Note 1). VIN, RUN/SS VIN + ADJ, RT, SHARE Internal Operating Temperature VOUT, (Note 2).. 40 C to 125 C. PGOOD, Storage 55 C to 125 C. Solder 250 C. PIN CONFIGURATION. GND (BANK 3) SHARE RT ADJ GND (BANK 3) SHARE RT ADJ. 7 7. SYNC SYNC. 6 PGOOD 6 PGOOD. 5 RUN/SS 5 RUN/SS. BIAS BIAS. 4 4. AUX AUX. 3 3. VOUT VOUT. (BANK 2) 2 VIN (BANK 2) 2 VIN. (BANK 1) (BANK 1). 1 1. A B C D E F G H A B C D E F G H. LGA PACKAGE BGA PACKAGE. 50-LEAD ( 9mm ) 50-LEAD ( 9mm ). TJMAX = 125 C, JA = C/W, JCbottom = C/W, TJMAX = 125 C, JA = C/W, JCbottom = C/W, JCtop = C/W, JB = C/W, WEIGHT = JCtop = C/W, JB = C/W, WEIGHT = VALUES DETERMINED PER JEDEC 51-9, 51-12 VALUES DETERMINED PER JEDEC 51-9, 51-12.

4 ORDER INFORMATION. PART NUMBER PAD OR BALL FINISH PART MARKING* PACKAGE MSL TEMPERATURE RANGE. DEVICE FINISH CODE TYPE RATING (Note 2). LTM8023EV#PBF Au (RoHS) LTM8023V e4 LGA 3 40 C to 85 C. LTM8023IV#PBF Au (RoHS) LTM8023V e4 LGA 3 40 C to 85 C. LTM8023 MPV#PBF Au (RoHS) LTM8023 MPV e4 LGA 3 55 C to 125 C. LTM8023EY#PBF SAC305 (RoHS) LTM8023Y e1 BGA 3 40 C to 85 C. LTM8023IY#PBF SAC305 (RoHS) LTM8023Y e1 BGA 3 40 C to 85 C. LTM8023IY SnPb (63/37) LTM8023Y e0 BGA 3 40 C to 85 C. LTM8023 MPY#PBF SAC305 (RoHS) LTM8023Y e1 BGA 3 55 C to 125 C. LTM8023 MPY SnPb (63/37) LTM8023Y e0 BGA 3 55 C to 125 C. Consult Marketing for parts specified with wider operating temperature Recommended LGA and BGA PCB Assembly and Manufacturing ranges. *Device temperature grade is indicated by a label on the shipping Procedures: container. Pad or ball finish code is per IPC/JEDEC J-STD-609.

5 Terminal Finish Part Marking: LGA and BGA Package and Tray Drawings: 8023fj 2 For more information LTM8023. ELECTRICAL. CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C. VIN = 10V, VRUN/SS = 10V, VBIAS = 3V, RT = , COUT = F unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS. VIN Input DC Voltage l 36 V. VOUT Output DC Voltage 0A < IOUT 2A, RADJ Open, COUT = 51 F (Note 3) V. 0A < IOUT 2A, RADJ = , COUT = 51 F (Note 3) 10 V. RADJ(MIN) Minimum Allowable RADJ (Note 4) k . IOUT Continuous Output DC Current 4 VIN 36, COUT = 51 F 0 2 A. IQVIN VIN Quiescent Current VRUN/SS = , RT = 174k A. VBIAS = 3V, Not Switching, RT = 174k (E, I) l 25 60 A. VBIAS = 3V, Not Switching, RT = 174k (MP) l 25 350 A. VBIAS = 0V, Not Switching, RT = 174k 85 120 A.

6 IQBIAS BIAS Quiescent Current VRUN/SS = , RT = 174k A. VBIAS = 3V, Not Switching, RT = 174k (E, I) l 50 120 A. VBIAS = 3V, Not Switching, RT = 174k (MP) l 50 200 A. VBIAS = 0V, Not Switching, RT = 174k 1 5 A. VOUT/VOUT Line Regulation 5 VIN 36, IOUT = 1A, VOUT = , COUT = 51 F %. VOUT/VOUT Load Regulation VIN = 24V, 0 IOUT 2A, VOUT = , COUT = 51 F %. VOUT(AC_RMS) Output Ripple (RMS) VIN = 24V, IOUT = 2A, VOUT = , COUT = 51 F 10 mV. fSW Switching Frequency RT = 113k, COUT = 51 F 325 kHz ISC(OUT) Output Short Circuit Current VIN = 36V, VOUT = 0V (Note 5) A. VADJ Voltage at ADJ Pin COUT = 51 F l 765 790 805 mV. VBIAS(MIN) Minimum BIAS Voltage for Proper V. Operation IADJ Current Out of ADJ Pin ADJ = 1V, COUT = 51 F 2 A. IRUN/SS RUN/SS Pin Current VRUN/SS = 5 10 A. VIH(RUN/SS) RUN/SS Input High Voltage COUT = 51 F V. VIL(RUN/SS) RUN/SS Input Low Voltage COUT = 51 F V.

7 VPGOOD(TH) PGOOD Threshold VOUT Rising 730 mV. IPGOOD(O) PGOOD Leakage VPGOOD = 30V 1 A. IPGOOD(SINK) PGOOD Sink Current VPGOOD = 200 800 A. VSYNCIL SYNC Input Low Threshold fSYNC = 550kHz, COUT = 51 F V. VSYNCIH SYNC Input High Threshold fSYNC = 550kHz, COUT = 51 F V. ISYNCBIAS SYNC Pin Bias Current VSYNC = 0V A. Note 1: Stresses beyond those listed under Absolute Maximum Ratings meet specifications over the full 55 C to 125 C temperature range. Note may cause permanent damage to the device. Exposure to any Absolute that the maximum internal temperature is determined by specific operating Maximum Rating condition for extended periods may affect device conditions in conjunction with board layout, the rated package thermal reliability and lifetime. resistance and other environmental factors. Note 2: The LTM8023E is guaranteed to meet performance specifications Note 3: COUT = 51 F is composed of a F ceramic capacitor in parallel from 0 C to 85 C ambient.

8 Specifications over the full 40 C to with a 47 F electrolytic. 85 C ambient operating temperature range are assured by design, Note 4: Guaranteed by design. characterization and correlation with statistical process controls. The Note 5: Short circuit current at VIN = 36V is guaranteed by characterization LTM8023I is guaranteed to meet specifications over the full 40 C to 85 C and correlation. 100% tested at VIN = 10V. ambient operating temperature range. The LTM8023MP is guaranteed to 8023fj For more information 3. LTM8023. TYPICAL PERFORMANCE CHARACTERISTICS TA = 25 C unless otherwise noted Efficiency (8 VOUT) Efficiency (5 VOUT) Efficiency ( ). 100 90 90. VOUT = 8V VOUT = 5V VOUT = 90 85 85. 80 80 80. EFFICIENCY (%). EFFICIENCY (%). EFFICIENCY (%). 70 75 75. 60 70 70. 50 65 65. 40 60 60. 5 VIN. 12 VIN 12 VIN 12 VIN. 30 55 55. 24 VIN 24 VIN 24 VIN.

9 36 VIN 36 VIN 36 VIN. 20 50 50. 1 1 1. OUTPUT CURRENT (A) OUTPUT CURRENT (A) OUTPUT CURRENT (A). 8023 G01 8023 G02 8023 G03. Minimum Required Input Voltage 36 VIN Start-Up Waveforms 36 VIN Start-Up Waveforms vs Output Voltage (5 VOUT) ( ). 20. IOUT = 2A. 18. VOUT VOUT. 16. 2V/DIV 2V/DIV. IIN. INPUT VOLTAGE (V). 14 OPERATING FREQUENCY IIN. AS RECOMMENDED 12 IN TABLE 1 RUN/SS RUN/SS. 10 5V/DIV 5V/DIV. 8023 G05 8023 G06. VIN = 36V 50 s/DIV VIN = 36V 50 s/DIV. 8 IOUT = 2A IOUT = 2A. 6 VBIAS = 3V VBIAS = 3V. 4. 2. 0 2 4 6 8 10. OUTPUT VOLTAGE (V). 8023 G04. Input Current vs Output Current Input Current vs Output Current Input Current vs Output Current 1600 1200 2000. VOUT = 8V VOUT = 5V VOUT = 1800. 1400. 1000. 1600. 1200. INPUT CURRENT (mA). INPUT CURRENT (mA). 1400. INPUT CURRENT (mA). 800. 1000 1200. 12 VIN 5 VIN. 600 24 VIN 1000 12 VIN. 800. 36 VIN 24 VIN.

10 800 36 VIN. 600. 400. 600. 400. 400. 12 VIN 200. 200 24 VIN 200. 36 VIN. 0 0 0. 0 500 1000 1500 2000 0 500 1000 1500 2000 0 500 1000 1500 2000. OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) OUTPUT CURRENT (mA). 8023 G07 8023 G08 8023 G09. 8023fj 4 For more information LTM8023. TYPICAL PERFORMANCE CHARACTERISTICS TA = 25 C unless otherwise noted Output Short-Circuit Current Maximum Load Current vs Input Voltage BIAS Current vs Load Current vs Input Voltage (8 VOUT, LGA). 3200 30 2500. 3000. 25. 2000. 2800. OUTPUT CURRENT (mA). LOAD CURRENT (mA). BIAS CURRENT (mA). 20. 2600 1500. 2400 15 5 VOUT. 8 VOUT. 1000. 2200. 10. 2000. 500. 5 25 C. 1800 40 C. 85 C. 1600 0 0. 0 10 20 30 40 0 500 1000 1500 2000 0 10 20 30 40. INPUT VOLTAGE (V) LOAD CURRENT (mA) INPUT VOLTAGE (V). 8023 G10 8023 G11 8023 G13. Load Current Load Current vs Input Voltage (5 VOUT, LGA) vs Input Voltage ( , LGA).