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60V, 4A DC/DC µModule Regulator The L TM®8027 is a complete 4A, DC/DC step-down power supply. Included in the package are the switching control- ler , power switches, inductor and all support components. Operating over an input voltage range of 4.5V to 60V (7.5V minimum voltage to start), the L TM8027 supports output voltages up to 24V , and a switching frequency range of 100kHz to 500kHz, each set by a single resistor . Only the bulk input and output filter capacitors are needed to finish the design. The low profile package (4.32mm) enables utilization of unused space on the bottom of PC boards for high den- sity point of load regulation. A built-in soft-start timer is adjustable with a small capacitor . The L TM8027 is packaged in a thermally enhanced, compact (15mm × 15mm) and low profile (4.32mm) over-molded land grid array (LGA) package suitable for automated assembly by standard surface mount equipment. The L TM8027 is Pb-free and RoHS compliant. L, L T , L TC, L TM, Linear Technology, the Linear logo and µModule are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 48W , 16VIN to 60VIN DC/DC µModule® Regulator n Complete Switch Mode Power Supply n Wide Input Voltage Range: 4.5V to 60V (7.5V Minimum V oltage to Start) n Wide Output Voltage Range: 2.5V to 24V (See T able 2) n 4A Output Current n Programmable Soft-Start n 9µA Shutdown Supply Current n Selectable Switching Frequency Current Mode Control n Up to 95% Efficiency n Pb-Free (e4) RoHS Compliant Package with Gold Pad Finish n Tiny, Low Profile (15mm × 15mm × 4.32mm) Sur face Mount LGA Package n 12V and 42V Automotive and Heavy Equipment n 48V Telecom Power Supplies n Avionics and Industrial Control Systems n Distributed Power Converters Efficiency vs Load LOAD (A) EFFICIENCY (%) 100 24VIN 1 2
8027 TA01b
3845 TA01a
48.7k 56.2k 4.7µF 22µF BIAS1 BIAS2 AUX
B V Cu A 0mA Internal Operating Temperature (Note 3) 40°C to 125°C M 55°C to 125°C 5°C 55°C to 125°C (Note 1) orDer inForMaTion LEAD FREE FINISH TRAY PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE (Note 3) L TM8027EV#PBF L TM8027EV#PBF L TM8027V 113-Lead (15mm × 15mm × 4.32mm) LGA –40°C to 125°C L TM8027IV#PBF L TM8027IV#PBF L TM8027V 113-Lead (15mm × 15mm × 4.32mm) LGA –40°C to 125°C L TM8027MPV#PBF L TM8027MPV#PBF L TM8027V 113-Lead (15mm × 15mm × 4.32mm) LGA –55°C to 125°C Consult L TC Marketing for parts specified with wider operating temperature ranges. For more information on lead free part marking, go to: http://www.linear .com/leadfree/ This product is only offered in trays. For more information go to: http://www.linear .com/packaging/ pin conFiguraTion LGA PACKAGE 113-LEAD (15mm × 15mm × 4.32mm) TOP VIEW RT A B C D E F G H J K L SYNC ADJ AUX V OUT BANK 1 GND BANK 2 VIN BANK 3 BIAS1 SS RUN BIAS2 TJMAX = 125°C, θJA = 12.2°C/W , θJC(TOP) = 9.3°C/W , θJC(BOTTOM) = 3.6°C/W , θJBOARD = 7.54°C/W θ VALUES DETERMINED PER JESD 51-9 WEIGHT = 2.6 GRAMS
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN Input DC Voltage (Note 5) l 4.5 60 V VOUT Maximum Output DC Voltage 0A < IOUT ≤ 4A, VIN = 48V 24 V IOUT Output DC Current VIN ≤ 60V , VOUT = 12V , (Note 4) 0 4 A VIN(START) Minimum Start Voltage 7.5 V ∆VOUT/∆VIN Line Regulation VOUT = 12V , 15V< VIN < 60V , ILOAD = 4A 0.2 % ∆VOUT/∆ILOAD Load Regulation VOUT = 12V , VIN = 24V , 0A < ILOAD ≤ 4A 0.2 % VUVLO(RISING) Input Undervoltage Lockout Threshold (Rising) (Note 5) 4.6 V VUVLO(FALLING) Input Undervoltage Lockout Threshold (Falling) (Note 5) 3.7 V The l denotes the specifications which apply over the full internal operating temperature range, otherwise specifications are at TA = 25°C. VIN = 20V , BIAS1 = BIAS2 = 10V , RUN = 2V , unless otherwise noted.
Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The RUN pin is internally clamped to 5V . Note 3: The L TM8027E is guaranteed to meet performance specifications from 0°C to 125°C internal operating temperature. Specifications over the full –40°C to 125°C internal operating temperature range are assured by design, characterization and correlation with statistical process controls. The L TM8027I is guaranteed to meet specifications over the full SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VADJ ADJ Voltage l 1.224 1.215 1.238 1.245 V V I Q(VIN) Quiescent Current into IN VBIAS = VAUX, VOUT = 12VDC, No Load VRUN = 0V mA µA VBIAS1 BIAS1 Undervoltage Lockout (Rising) BIAS1 Undervoltage Lockout (Falling) 6.5 V V I BIAS1 Current into BIAS1 No Load RUN = 0V mA µA V BIAS2 Minimum BIAS2 Voltage 3 V IBIAS2 Current Into BIAS2 1 µA VBIAS1(MINOV) Minimum Voltage to Overdrive Internal Regulator (INTV CC) 8.5 V RFB Internal Feedback Resistor 499 kΩ VRUN(RISING) RUN Enable Voltage (Rising) 1.4 V VRUN(FALLING) RUN Enable Voltage (Falling) 1.2 V fSW Switching Frequency RT = 187kΩ RT = 23.7kΩ 100 500 kHz kHz R SYNC SYNC Input Resistance 40 kΩ VSYNC(TH) SYNC Voltage Threshold fSYNC = 350kHz l 2.3 V ISS Soft-Start Charging Current 2 µA The l denotes the specifications which apply over the full internal operating temperature range, otherwise specifications are at TA = 25°C. VIN = 20V , BIAS1 = BIAS2 = 10V , RUN = 2V , unless otherwise noted. –40°C to 125°C internal operating temperature range. The L TM8027MP is guaranteed to meet specifications over the full –55°C to 125°C internal operating range. Note that the maximum internal temperature is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental factors. Note 4: The maximum continuous output current may be derated by the L TM8027 junction temperature. Note 5: V IN voltages below the start-up threshold (7.5V) are only supported when BIAS1 is externally driven above 6.5V .
Typical perForMance characTerisTics Efficiency vs Load, VOUT = 2.5V Efficiency vs Load, VOUT = 8V LOAD (A) EFFICIENCY (%) 100 1 2
8027 G01
Efficiency vs Load, VOUT = 3.3V LOAD (A) EFFICIENCY (%) 100 1 2
8027 G02
Efficiency vs Load, VOUT = 5V LOAD (A) EFFICIENCY (%) 100 1 2
8027 G03
LOAD (A) EFFICIENCY (%) 100 1 2
8027 G04
Efficiency vs Load, VOUT = 12V LOAD (A) EFFICIENCY (%) 100 1 2
8027 G05
Efficiency vs Load, VOUT = 15V LOAD (A) EFFICIENCY (%) 100 1 2
8027 G06
Efficiency vs Load, VOUT = 18V LOAD (A) EFFICIENCY (%) 100 1 2
8027 G07
Efficiency vs Load, VOUT = 24V LOAD (A) EFFICIENCY (%) 100 1 2
8027 G08
(TA = 25°C unless otherwise noted) INPUT VOLTAGE (V) INPUT CURRENT (A) 0.8 1.0 1.2 30 50
8027 G09
0.6 0.4 10 20 40 60 70 0.2
Input Current vs Load, VOUT = 2.5V Input Current vs Load, V OUT = 3.3V Input Current vs Load, V OUT = 5V Input Current vs Load, V OUT = 8V Input Current vs Load, V OUT = 12V Input Current vs Load, V OUT = 15V Input Current vs Load, V OUT = 18V Input Current vs Load, V OUT = 24V Bias Current vs Load, V OUT = 2.5V Typical perForMance characTerisTics (TA = 25°C unless otherwise noted) LOAD (A) INPUT CURRENT (mA) 500 1000 1500 2000 2500 3000 1 2 3 4
8027 G10
LOAD (A) 2000 2500 3500
8027 G11
3000INPUT CURRENT (mA) 5VIN 12VIN 24VIN 36VIN 48VIN 60VIN LOAD (A) INPUT CURRENT (mA) 200 600 800 1000 2000 1400 1 2
8027 G12
LOAD (A) 2000 2500 3500
8027 G13
3000INPUT CURRENT (mA) 12VIN 24VIN 36VIN 48VIN 60VIN LOAD (A) INPUT CURRENT (mA) 1000 1500
8027 G14
LOAD (A) INPUT CURRENT (mA) 500 1000 1500 2000 2500 3000 1 2 3 4
8027 G15
LOAD (A) INPUT CURRENT (mA) 500 1000 1500 2000 2500 3500 3000 1 2 3 4
8027 G16
LOAD (A) INPUT CURRENT (mA) 500 1000 1500 2000 2500 3500 3000 1 2 3 4
8027 G17
LOAD (A) BIAS CURRENT (mA) 14.00 14.50
8027 G18
13.50 13.00 12.00 1 2 3 12.50 15.50 15.00 36VIN 24VIN 12VIN
Bias Current vs Load, VOUT = 3.3V Bias Current vs Load, V OUT = 5V Bias Current vs Load, V OUT = 8V Bias Current vs Load, V OUT = 12V Bias Current vs Load, V OUT = 15V Bias Current vs Load, V OUT = 18V Bias Current vs Load, V OUT = 24V Minimum VIN vs Load, VOUT = 5V Minimum VIN vs Load, VOUT = 8V Typical perForMance characTerisTics (TA = 25°C unless otherwise noted) LOAD (A) BIAS CURRENT (mA) 14.5 15.0 15.5 18.0 16.5 1 2
8027 G19
14.0 17.0 17.5 16.0 3 4 48VIN 36VIN 24VIN 12VIN LOAD (A) BIAS CURRENT (mA) 14.5 15.0
8027 G20
14.0 13.0 1 2 3 13.5 16.0 15.5 48VIN 36VIN 24VIN 12VIN LOAD (A) BIAS CURRENT (mA) 24.5 25.0
8027 G21
24.0 23.5 23.0 22.5 22.0 1 2 3 26.0 25.5 48VIN 36VIN 24VIN LOAD (A) BIAS CURRENT (mA) 27.0 27.5 28.5 28.0
8027 G22
26.5 26.0 25.0 1 2 3 25.5 29.5 29.0 48VIN 36VIN 24VIN LOAD (A) BIAS CURRENT (mA)
8027 G23
LOAD (A) BIAS CURRENT (mA) 1 2
8027 G24
LOAD (A) BIAS CURRENT (mA)
8027 G25
LOAD (A) 5.0 VIN (V) 5.1 5.3 5.4 5.5 6.0 5.7 1 2
8027 G26
5.2 5.8 5.9 5.6 3 4 LOAD (A) 8.0 VIN (V) 8.2 8.6 8.8 9.0 10.0 9.4 1 2
8027 G27
8.4 9.6 9.8 9.2 3 4
Minimum VIN vs Load, VOUT = 12V Minimum VIN vs Load, VOUT = 15V Minimum VIN vs Load, VOUT = 18V Minimum VIN vs Load, VOUT = 24V Minimum VIN vs VOUT, IOUT = 4A Minimum VIN vs Load, VOUT = –3.3V Minimum VIN vs Load, VOUT = –5V Minimum VIN vs Load, VOUT = –8V Minimum VIN vs Load, VOUT = –12V Typical perForMance characTerisTics (TA = 25°C unless otherwise noted) LOAD (A) VIN (V)14.0 14.5 15.0
8027 G28
13.5 13.0 12.0 1 2 3 12.5 16.0 15.5 LOAD (A) VIN (V)17.0 17.5 18.0
8027 G29
16.5 16.0 15.0 1 2 3 15.5 19.0 18.5 LOAD (A) VIN (V) 1 2 3 4
8027 G30
LOAD (A)
8027 G31
VIN (V) VOUT (V)
8027 G32
VIN (V) LOAD (A) VIN (V) 5
8027 G33
LOAD (A) VIN (V) 1 2 3 4
8027 G34
LOAD (A) VIN (V) 1 2 3 4
8027 G35
LOAD (A) VIN (V) 1 2
8027 G36
Temperature Rise vs Load, VOUT = 2.5V Temperature Rise vs Load, V OUT = 3.3V Temperature Rise vs Load, V OUT = 5V Temperature Rise vs Load, V OUT = 8V Temperature Rise vs Load, V OUT = 12V Temperature Rise vs Load, V OUT = 15V Temperature Rise vs Load, V OUT = 18V Temperature Rise vs Load, V OUT = 24V Typical perForMance characTerisTics (TA = 25°C unless otherwise noted) LOAD (A) TEMPERATURE RISE (°C)
8027 G37
LOAD (A) TEMPERATURE RISE (°C)
8027 G38
LOAD (A) TEMPERATURE RISE (°C) 1 2
8027 G39
LOAD (A)
8027 G40
TEMPERATURE RISE (°C) 60VIN 48VIN 36VIN 24VIN 12VIN LOAD (A) TEMPERATURE RISE (°C)
8027 G41
LOAD (A) TEMPERATURE RISE (°C)
8027 G42
20.5VIN LOAD (A) TEMPERATURE RISE (°C) 100 1 2
8027 G43
LOAD (A) TEMPERATURE RISE (°C) 100 1 2
8027 G44
VIN (Bank 3): The VIN pins supply current to the L TM8027’s internal regulator and to the internal power switch. These pins must be locally bypassed with an external, low ESR capacitor (see Table 2). V OUT (Bank 1): Power Output Pins. Apply the output filter capacitor and the output load between these and the GND pins. AUX (Pin A7): Low Current Voltage Source for BIAS1 and BIAS2. In many designs, the BIAS pin is connected to V OUT by way of the AUX pin. The AUX pin is internally connected to VOUT and is placed near the BIAS pins to ease printed circuit board routing. Although this pin is internally connected to V OUT, do NOT connect this pin to the load. If this pin is not tied to BIAS1 and BIAS2, leave it floating. BIAS1 (Pin A6): The BIAS1 pin connects to the internal power bus. Connect to a power source greater than 8.5V . If the output is greater than 8.5V , connect it to this pin. If the output voltage is less, connect this to a voltage source between 8.5V and 15V . BIAS2 (Pin A3): Internal Biasing Power . Connect to AUX (if 24V or less) or a voltage source above 3V . Do not leave BIAS2 floating. RUN (Pin A4): Tie the RUN pin to ground to shut down the L TM8027. Tie to 1.4V or more for normal operation. The RUN pin is internally clamped to 5V , so when it is pulled up, be sure to use a pull-up resistor that limits the cur - rent in to the RUN pin to less than 1mA. If the shutdown feature is not used, tie this pin to the V IN pin through a pull-up resistor . GND (Bank 2): Tie these GND pins to a local ground plane below the L TM8027 and the circuit components. RT (Pin B1): The RT pin is used to program the switching frequency of the L TM8027 by connecting a resistor from this pin to ground. The Applications Information section of the data sheet includes a table to determine the resistance value based on the desired switching frequency. Minimize capacitance at this pin. SYNC (Pin C1): The SYNC pin provides an external clock input for synchronization of the internal oscillator . The R T resistor should be set such that the internal oscillator fre- quency is 10% to 25% below the external clock frequency. This external clock frequency must be between 100kHz and 500kHz. If unused, the SYNC pin is connected to GND. For more information see Oscillator Sync in the Application Information section of this data sheet. ADJ (Pin A2): The L TM8027 regulates its ADJ pin to 1.23V . Connect the adjust resistor from this pin to ground. The value of R ADJ is given by the equation: RADJ = 613.77/(VOUT – 1.23) where RADJ is in kΩ. SS (Pin A5): The soft-start pin is used to program the supply soft-start function. Use the following formula to calculate C SS for a given output voltage slew rate: CSS = 2µA(tSS/1.231V) The pin should be left unconnected when not using the soft-start function.
The L TM8027 is a standalone nonisolated step-down switching DC/DC power supply with an input voltage range of 4.5V to 60V that can deliver up to 4A of output current. This module provides a precisely regulated output voltage up to 24V , programmable via one external resistor . Given that the L TM8027 is a step-down converter , make sure that the input voltage is high enough to support the desired output voltage and load current. A simplified block diagram is given above. The L TM8027 contains a current mode controller , power switching element, power induc- tor , power MOSFETs and a modest amount of input and output capacitance. The L TM8027 is a fixed frequency PWM regulator . The switching frequency is set by simply connecting the ap- propriate resistor from the RT pin to GND. A linear regulator provides internal power (shown as INTV CC on the Block Diagram) to the control circuitry. The bias regulator normally draws power from the V IN pin, but if the BIAS1 pin is connected to an external volt- age higher than 8.5V , bias power will be drawn from the external source (typically the regulated output voltage). This improves efficiency. The RUN pin is used to enable or place the L TM8027 in shutdown, disconnecting the output and reducing the input current to less than 9µA. 8027 BD VIN VIN INTVCC 6.8µH RUN 2.2µF CURRENT MODE CONTROLLER INTERNAL CONNECTION TO VOUT SS SYNC AUX BIAS1 BIAS2 GND RT ADJ VOUT INTERNAL LINEAR REGULATOR 4.7pF 499k
For most applications, the design process is straight forward, summarized as follows: 1. Look at Table 2 and find the row that has the desired input range and output voltage. . Apply the recommended CIN, COUT, RADJ and RT values. 3. Connect the BIAS pins as indicated. While these component and connection combinations have been tested for proper operation, it is incumbent upon the user to verify proper operation over the intended system’ s line, load and environmental conditions. Capacitor Selection Considerations The C IN and C OUT capacitor values in Table 2 are the minimum recommended values for the associated oper- ating conditions. Applying capacitor values below those indicated in Table 2 is not recommended, and may result in undesirable operation. Using larger values is generally acceptable, and can yield improved dynamic response, if it is necessary. Again, it is incumbent upon the user to verify proper operation over the intended system’s line, load and environmental conditions. Ceramic capacitors are small, robust and have very low ESR. However , not all ceramic capacitors are suitable. X5R and X7R types are stable over temperature and ap- plied voltage and give dependable service. Other types, including Y5V and Z5U have very large temperature and voltage coefficients of capacitance. In an application cir- cuit they may have only a small fraction of their nominal capacitance resulting in much higher output voltage ripple than expected. A final precaution regarding ceramic capacitors concerns the maximum input voltage rating of the L TM8027. A ceramic input capacitor combined with trace or cable inductance forms a high Q (under damped) tank circuit. If the L TM8027 circuit is plugged into a live supply, the input voltage can ring to twice its nominal value, possi- bly exceeding the device’s rating. This situation is easily avoided; see the Hot-Plugging Safely section. Input Power Requirements The L TM8027 is biased using an internal linear regulator to generate operational voltages from the V IN pin. Virtually all of the circuitry in the L TM8027 is biased via this internal linear regulator output (INTV CC on the Block Diagram). This pin is internally decoupled with a low ESR capacitor to GND. The INTV CC regulator generates an 8V output provided there is ample voltage on the VIN pin. The INTVCC regulator has approximately 1V of dropout, and will follow the V IN pin with voltages below the dropout threshold. The L TM8027 has a typical start-up requirement of VIN > 7.5V . This assures that the onboard regulator has ample headroom to bring the internal regulator (INTV CC) above its UVLO threshold. The INTVCC regulator can only source current, so forcing the BIAS1 pin above 8.5V allows use of externally derived power for the IC. This effectively shuts down the internal linear regulator and reduces power dissipation within the L TM8027. Using the onboard regulator for start-up, then applying power to BIAS1 from the converter output or external supply maximizes con- version efficiencies and is a common practice. If IBIAS1 is maintained above 6.5V using an external source, the L TM8027 can continue to operate with V IN as low as 4.5V . BIAS Power The internal circuitry of the L TM8027 is powered by the INTVCC bus, which is derived either from the afore men- tioned internal linear regulator or the BIAS1 pin, if it is greater than 8.5V . Since the internal linear regulator is by nature dissipative, deriving INTV CC from an external source through the BIAS pins reduces the power lost within the L TM8027 and can increase overall system efficiency. applicaTions inForMaTion
effect on the operating temperature of the L TM8027. dissipate this amount of power for very long. to 200mV above the internal reference of 1.231V . bias, the SS pin voltage is discharged with a 50µA current. during a short-circuit recovery. this pin is used to charge an internal oscillator capacitor . chosen from Figure 1 or Table 1. Figure 1. Timing Resistor (RT) Value
8027 F01
Table 1. RT Resistor Values vs Frequency in Table 2 for the input and output operating condition. too much output ripple or too large of an output capacitor . refer to the Synchronization section for details. The L TM8027 RUN pin uses a reference threshold of 1.4V . before disabling the converter . age lockout is disabled and the supply turns on.
maximum input current rating of 1mA is not exceeded. board’s input connector , instead. The oscillator can be synchronized to an external clock. at least 10% below the desired synchronization frequency. of the internal oscillator capacitor . Figure 2. Undervoltage Lockout Resistive Divider
8027 F02
Ensure that the grounding and heat sinking are acceptable.
- Place the RADJ and RT resistors as close as possible to
- Place the CIN capacitor as close as possible to the VIN
and GND connection of the L TM8027.
- Place the C OUT capacitor as close as possible to the
VOUT and GND connection of the L TM8027.
- Place the C IN and C OUT capacitors such that their
- Connect all of the GND connections to as large a copper
components and the L TM8027.
8027 F03
Figure 3. Suggested Layout Figure 3. The L TM8027 can benefit from the heat sinking system’s line, load and environmental operating conditions.
be used to estimate the L TM8027 internal temperature. depends upon the design of the circuit board. Table 2. Recommended Component Values and Configuration
3.3V VOUT Step-Down Converter 5V VOUT Step-Down Converter VIN RUN SS SYNC RT ADJ VOUT GND
3845 TA02
VIN* 4.5V TO 40V VOUT 3.3V 102k 301k *RUNNING VOL TAGE. SEE APPLICATIONS INFORMATION FOR START-UP DETAILS 10µF 100µF BIAS1 BIAS2 AUX VIN RUN SS SYNC RT ADJ VOUT GND
3845 TA03
7.5V TO 60V VOUT 75k 162k 4.7µF 100µF BIAS1 BIAS2 AUX
18V VOUT Step-Down Converter VIN RUN SS SYNC RT ADJ VOUT GND
3845 TA05
9V31.6k 36.5k 4.7µF 10µF BIAS1 BIAS2 AUX –12V VOUT Positive-to-Negative Converter VIN RUN SS SYNC RT ADJ VOUT GND
3845 TA07
48.7k 56.2k 4.7µF 22µF SCHOTTKY DIODE OPTIONAL V OUT –12V BIAS1 BIAS2 AUX Typical applicaTions
113-Lead (15mm × 15mm × 4.32mm) (Reference L TC DWG # 05-08-1756 Rev Ø) NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M-1994 2. ALL DIMENSIONS ARE IN MILLIMETERS LAND DESIGNATION PER JESD MO-222, SPP-010 5. PRIMARY DATUM -Z- IS SEATING PLANE 6. THE TOTAL NUMBER OF PADS: 113 DETAILS OF PAD #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE PAD #1 IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE SYMBOL aaa bbb eee TOLERANCE 0.15 0.10 0.05 4.22 – 4.42 DETAIL B DETAIL B SUBSTRATE MOLD CAP 0.27 – 0.37 3.95 – 4.05 // bbb Z Z BSC PACKAGE TOP VIEW BSC PAD 1 CORNER X Y aaa Z aaa Z DETAIL A 12.70 BSC 1.27 BSC 12.70 BSC L K J H G F E D C B PACKAGE BOTTOM VIEW C(0.30) PAD 1 PADS SEE NOTES A DETAIL A 0.635 ±0.025 SQ. 113x S Y X eee SUGGESTED PCB LAYOUT TOP VIEW 0.000 1.270 1.270 2.540 2.540 3.810 3.810 5.080 5.080 6.350 6.350 6.350 6.350 3.810 3.810 5.080 5.080 2.540 2.540 1.270 1.270 0.000 LGA 113 0807 REV Ø L TMXXXXXX µModule TRAY PIN 1 BEVEL PACKAGE IN TRAY LOADING ORIENTATION COMPONENT PIN “A1” Please refer to http://www.linear .com/designtools/packaging/ for the most recent package drawings.
(Arranged by Pin Number) PIN NAME D6 GND D7 GND D8 GND D9 GND D10 GND D11 GND E1 GND E2 GND E3 GND E4 GND E5 GND E6 GND E7 GND E8 GND E9 V OUT E10 V OUT E11 V OUT F1 GND F2 GND F3 GND F4 GND F5 GND F6 GND F7 GND F8 GND F9 V OUT F10 V OUT F11 V OUT G5 GND G6 GND G7 GND G8 GND G9 V OUT G10 V OUT G11 V OUT H1 V IN H2 V IN H3 V IN PIN NAME H5 GND H6 GND H7 GND H8 GND H9 V OUT H10 V OUT H11 V OUT J1 V IN J2 V IN J3 V IN J5 GND J6 GND J7 GND J8 GND J9 V OUT J10 V OUT J11 V OUT K1 V IN K2 V IN K3 V IN K5 GND K6 GND K7 GND K8 GND K9 V OUT K10 V OUT K11 V OUT L1 V IN L2 V IN L3 V IN L5 GND L6 GND L7 GND L8 GND L9 V OUT L10 V OUT L11 V OUT
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However , no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
revision hisTory
REV DATE DESCRIPTION PAGE NUMBER A 1/11 Changed Shutdown Current Supply to 9µA in Features. Updated Absolute Maximum Ratings section. Updated VBIAS1(MINOV) and Note 3 in Electrical Characteristics section. Replaced graph 9. Updated Pin Functions section. Text edits to Applications Information. Updated Typical Applications. Updated Related Parts. 11-16 17, 18 B 9/11 Added (Note 3) notation to the Order Information section. Updated minimum spec for V BIAS2. Updated descriptions for AUX and BIAS2 in the Pin Functions section. Updated text in the Input Power Requirements section. Added text to end of the BIAS Power section.
Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear .com LINEAR TECHNOLOGY CORPORA TION 2009 LT 0911 REV B • PRINTED IN USA relaTeD parTs PART NUMBER DESCRIPTION COMMENTS L TM4600 10A DC/DC µModule Regulator 10A DC/DC Step-Down µModule Regulator , 15mm × 15mm × 2.8mm LGA L TM4600HVMPV Military Plastic 10A DC/DC µModule Regulator –55°C to 125°C Operation, 15mm × 15mm × 2.8mm LGA L TM4601/ L TM4601A 12A DC/DC µModule Regulator with PLL, Output T racking/Margining and Remote Sensing Synchronizable, PolyPhase Operation, L TM4601-1 Version has no Remote Sensing L TM4602 20V , 6A DC/DC µModule Regulator Pin Compatible with the L TM4600 L TM4603 6A DC/DC µModule with PLL and Output T racking/ Margining and Remote Sensing Synchronizable, PolyPhase Operation, L TM4603-1 Version has no Remote Sensing, Pin Compatible with the L TM4601 L TM4604A 4A Low V IN DC/DC µModule Regulator 2.375V ≤ VIN ≤ 5V , 0.8V ≤ VOUT ≤ 5V , 9mm × 15mm × 2.3mm LGA L TM4608A 8A Low V IN DC/DC µModule Regulator 2.7V ≤ VIN ≤ 5V , 0.6V ≤ VOUT ≤ 5V , 9mm × 15mm × 2.8mm LGA L TM8020 200mA, 36V DC/DC µModule Regulator Fixed 450kHz Frequency, 1.25V ≤ VOUT ≤ 5V , 6.25mm × 6.25mm × 2.32mm LGA L TM8022 1A, 36V DC/DC µModule Regulator Adjustable Frequency, 0.8V ≤ VOUT ≤ 5V , 9mm × 11.25mm × 2.82mm LGA, Pin Compatible to the L TM8023 L TM8023 2A, 36V DC/DC µModule Regulator Adjustable Frequency, 0.8V ≤ VOUT ≤ 5V , 9mm × 11.25mm × 2.82mm LGA, Pin Compatible to the L TM8022 L TM8025 3A, 36V DC/DC µModule Regulator 0.8V ≤ VOUT ≤ 24V , 9mm × 15mm × 4.32mm LGA 15V VOUT Step-Down Converter VIN RUN SS SYNC RT ADJ VOUT GND
3845 TA04
20.5V TO 60V VOUT 15V 3.5A 4A SURGE 40.2k 44.2k 4.7µF 22µF BIAS1 BIAS2 AUX Typical applicaTion