SC1452 Dual 150mA LDO Regulator with Programmable Reset POWER MANAGEMENT Description Features The SC1452 is a state of the art device intended to provide maximum performance and flexibility in battery operated systems. It has been designed specifically to fully support a single Li-Ion battery and its external charger voltages. Up to 150mA per regulator output Low quiescent current (130µA typical with both The SC1452 contains two independently enabled, ultra low dropout voltage regulators (ULDOs). It operates from an input voltage range of 2.25V to 6.5V, and a wide variety of output voltage options are available which are designed to provide an initial tolerance of ±1% and ±2% over temperature. Each regulator has an associated active-low reset signal which is asserted when the voltage output declines below the preset threshold. Once the output recovers, the reset continues to be asserted (delayed) for a predetermined time, 50ms for reset A and 150ms for reset B. In the case of regulator B, the delay time may be reduced by the addition of an external capacitor. outputs at 150mA) Low dropout voltage Wide selection of output voltages Stable operation with ceramic caps Tight load and line regulation Current and thermal limiting Reverse input polarity protection <1µA off-mode current Logic controlled enable Active low resets valid for VIN down to 0V Programmable reset Full industrial temperature range 10-Pin MSOP package. Also available in Lead-free, fully WEEE and RoHS compliant Applications The SC1452 has a bypass pin to enable the user to capacitively decouple the bandgap reference for very low output noise (down to 50µVrms). The devices utilize CMOS technology to achieve very low operating currents (typically 130uA with both outputs supplying 150mA). The dropout voltage is typically 155mV at 150mA, helping to prolong battery life. In addition, the devices are guaranteed to provide 400mA of peak current for applications which require high initial inrush current. They have been designed to be used with low ESR ceramic capacitors to save cost and PCB area. The SC1452 comes in the low profile 10-lead MSOP package. Cellular telephones Palmtop/Laptop computers Battery-powered equipment Bar code scanners SMPS post regulator/dc to dc modules High efficiency linear power supplies DSP supplies Typical Application Circuit U1 1 3.0V OUT 2 2.5V OUT 3 4 RESET A 5 RESET B OUTA OUTB IN ENA GND BYP RSTA ENB RSTB DLYB 10 3.3V IN 9 ENABLE OUTPUT A 8 7 ENABLE OUTPUT B 6 SC1452FIMS COUTA 1uF Revision: September 20, 2006 COUTB 1uF CBYP 10nF 1 CDLYB 10nF CIN 1uF www.semtech.com SC1452 POWER MANAGEMENT Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied. Exposure to Absolute Maximum rated conditions for extended periods of time may affect device reliability. Parameter Symbol Maximum Units Input Supply Voltage VIN -5 to +7 V Enable Input Voltage V EN -5 to +VIN V Operating Ambient Temperature Range TA -40 to +85 °C Operating Junction Temperature Range TJ -40 to +125 °C Storage Temperature TSTG -60 to +150 °C Thermal Impedance Junction to Ambient θJ A 113 °C/W Thermal Impedance Junction to Case θJ C 42 °C/W ESD 2 kV ESD Rating (Human Body Model) Electrical Characteristics Unless specified: TA = 25°C, VIN = VOUT + 1V, IOUTA = IOUTB = 1mA, CIN = COUT = 1.0 µF, VENA = VENB = VIN. Values in bold apply over full operating temperature range. Parameter Symbol Conditions Min Typ Max Units 6.5 V 150 µA IN Input Supply Voltage VIN Quiescent Current IQ 2.25 110 VENA = 0V, VENB = VIN, IOUTB = 150mA or 200 VENB = 0V, VENA = VIN, IOUTA = 150mA VENA = VENB = VIN, IOUTA = IOUTB = 150mA 130 200 µA 250 VIN = 6.5V, VENA = VENB = 0V (OFF) 0.2 1.0 µA 1.5 OUTA, OUTB Output Voltage(1) Line Regulation(1) VOUT REG(LINE) IOUT = 1mA -1% 0mA ≤ IOUT ≤ 150mA, VOUT +1V ≤VIN ≤ 5.5V -2% VOUT + 1V ≤ VIN ≤ 5.5V, IOUT = 1mA VOUT +1% V +2% 2.5 10 mV 12 Load Regulation(1) REG(LOAD) 0.1mA ≤ IOUT ≤150mA -5 -20 mV -30 2006 Semtech Corp. 2 www.semtech.com SC1452 POWER MANAGEMENT Electrical Characteristics (Cont.) Unless specified: TA = 25°C, VIN = VOUT + 1V, IOUTA = IOUTB = 1mA, CIN = COUT = 1.0 µF, VENA = VENB = VIN. Values in bold apply over full operating temperature range. Parameter Dropout Voltage(1)(2) Symbol Conditions Min Typ VD IOUT = 1mA 1 IOUT = 50mA 52 Max Units mV 70 mV 90 IOUT = 150mA 155 210 mV 270 Current Limit Ripple Rejection Output Voltage Noise ILIM 400 mA PSRR f = 120Hz, CBYP = 10nF 59 dB en f = 10Hz to 100kHz, IOUT = 50mA, CBYP = 10nF, COUT = 2.2µF, 1.8V output 27 µVRMS f = 10Hz to 100kHz, IOUT = 50mA, CBYP = 10nF, COUT = 2.2µF, 3.3V output 55 CBYP = 10nF 1.25 BYP Start-up Rise Time tr ms ENA, ENB Enable Input Threshold VIH 1.6 V VIL Enable Input Bias Current(3) 0.4 IENA/B 0V ≤ VENA/B ≤ VIN -0.5 VTH(RST) VOUT falling 88 VOUT rising +0.5 µA 90 92 %VOUT 90 92 94 30 50 70 ms 90 150 210 ms RSTA, RSTB Reset Threshold Reset A Delay tRSTA Reset B Delay tRSTB VDLYB= 0V CDLYB= 10nF Reset A, B Output Voltage (4) VOH ISOURCE= 0.5mA VOL ISINK= 1.2mA 4 90 98 0.02 %VOUT 0.10 V DLYB Delay Voltage Threshold Delay Source Current 2006 Semtech Corp. VTH(DLYB) IDLYB 1.250 VOUTB < VTH 3 2.1 3.0 V 3.9 µA www.semtech.com SC1452 POWER MANAGEMENT Electrical Characteristics (Cont.) Unless specified: TA = 25°C, VIN = VOUT + 1V, IOUTA = IOUTB = 1mA, CIN = COUT = 1.0 µF, VENA = VENB = VIN. Values in bold apply over full operating temperature range. Parameter Symbol Conditions Min Typ Max Units Over Temperature Protection High Trip Level Hysteresis THI 150 °C THYST 20 °C NOTES: (1) Low duty cycle pulse testing with Kelvin connections required. (2) Defined as the input to output differential at which the output drops 100mV below the value measured at a differential of 1V. Not measurable on 1.5V and 1.8V outputs due to minimum VIN constraints. (3) Guaranteed by design. (4) VOHA will be a percentage of VOUTA, and VOHB will be a percentage of VOUTB. Timing Diagrams 2006 Semtech Corp. 4 www.semtech.com SC1452 POWER MANAGEMENT Pin Configuration Voltage Options Replace X in the part number (SC1452XIMS) by the letter shown below for the corresponding voltage option: (Top View) MSOP-10 Ordering Information Part Numbers SC1452XIMSTR P ackag e X VOUTA (V) VOUTB (V) A 1.8 1.8 B 2.5 2.5 C 2.8 2.8 D 3.0 3.0 E 3.3 3.3 F 3.0 2.5 G 3.0 1.8 H 3.0 2.8 J 3.3 2.5 K 3.3 2.8 (1)(2) SC1452XIMSTRT (1)(2)(3) MSOP-10 Notes: (1) Where X denotes voltage options - see Voltage Options table. (2) Only available in tape and reel packaging. A reel contains 2500 devices. (3) Lead-free product. This product is fully WEEE and RoHS compliant. Pin Descriptions Pin # Pin Name 1 OUTA Regulator A output. 2 OUTB Regulator B output. 3 GND Ground pin. 4 RSTA Power on reset for output A. Active low when OUTA is below the reset threshold. RSTA goes high 50ms (typical) after OUTA rises above the reset threshold. 5 RSTB Power on reset for output B. Active low when OUTB is below the reset threshold. RSTB goes high 150ms (typical - can be adjusted using C DLYB) after OUTB rises above the reset threshold. 6 DLYB Programmable delay for RESETB. Delay time can be set by connecting a capacitor, CDLYB, between this pin and ground. Ground this pin if using the default delay time. 7 ENB Active high enable pin for output B. CMOS compatible input. Connect to IN if not being used. 8 BYP Bypass pin for bandgap reference. Connect a 10nF capacitor, CBYP, between this pin and ground for low noise operation. 9 ENA Active high enable pin for output A. CMOS compatible input. Connect to IN if not being used. 10 IN 2006 Semtech Corp. Pin Function Input pin for both regulators. 5 www.semtech.com SC1452 POWER MANAGEMENT Block Diagram Marking Information # = Voltage options (Example: 452F) yyww = Datecode (Example: 0008) XXXX = Lot Number (Example: E01102) 2006 Semtech Corp. 6 www.semtech.com SC1452 POWER MANAGEMENT Applications Information Theory Of Operation initial currents for DSP initialization. The SC1452 is intended for applications where very low dropout voltage, low supply current and low output noise are critical. Furthermore, the SC1452, by combining two ultra Descriptions low dropout (ULDO) regulators, along with enable PIN controls and power-on resets (which function is usually served by external devices), provides a very space efficient solution for multiple supply requirements. The SC1452 has a fast start-up circuit to speed up the initial charging time of the bypass capacitor to enable the output voltage to come up quicker. The SC1452 includes thermal shutdown circuitry to turn off the device if T J exceeds 150°C (typical), with the device remaining off until TJ drops by 20°C (typical). Reverse battery protection circuitry ensures that the device cannot be damaged if the input supply is accidentally reversed, limiting the reverse current to less than 1.5mA. The SC1452 contains two ULDOs, both of which are supplied by one input supply, between IN and GND. Each ULDO has its own active high enable pin (ENA/ENB). Pulling this pin low causes that specific ULDO to enter a very low power shutdown state. Adjusting RSTB Delay Time Each ULDO also has its own power on reset pin (RSTA/ RSTB), which asserts low whenever the output voltage is below the reset threshold for that output. Each reset remains asserted low until a specific delay time after the output rises back above the reset threshold. For output A, this delay time is typically 50ms. Output B has a programmable reset delay. If DLYB is grounded, the reset delay will be controlled by an internal timer to 150ms. If a capacitor is connected between DLYB and GND, a constant current, IDLYB, charges this capacitor until the delay threshold, VTH(DLYB), is reached, or the internal timer times out. See “Adjusting RSTB Delay Time”. One advantage of on-board resets is that they remain asserted low all the way down to V IN = 0V, whereas external devices may require pull-down resistors. The power on reset delay for regulator B, tRSTB, can be reduced externally by connecting a capacitor to the delay time set pin DLYB. If DLYB is connected to ground, the internally controlled delay time of 150ms (typ.) will apply. Referring to the block diagram, as the output of regulator B (VOUTB) rises and reaches the reset threshold voltage (92% VOUTB(NOM)), two things happen: 1) the internal 150ms timer starts; 2) the 3µA current source turns on, charging CDLYB (if connected). If DLYB is connected to ground, RSTB goes high 150ms after VOUTB crosses the threshold voltage. If a capacitor is connected between DLYB and ground, the voltage at DLYB can be described by the following equation: A bypass pin (BYP) is provided to decouple the bandgap reference to reduce output noise (on both outputs) and also to improve power supply rejection. VDLYB = 3 • 10 −6 • t C DLYB The SC1452 contains an internal bandgap reference which is fed into the inverting input of two error amplifiers, one for each output. The output voltage of each regulator is divided down internally using a resistor divider and compared to the bandgap voltage. The error amplifier drives the gate of a low RDS(ON) P-channel MOSFET pass device. An internal comparator compares this voltage to a 1.25V reference, and triggers the reset high once this voltage is reached. The delay time can be calculated by rearranging the above equation, solving for t: Each regulator has its own current limit circuitry to ensure that the output current will not damage the device during output short, overload or start-up. The current limit is guaranteed to be greater than 400mA to allow fast charging of the output capacitor and high Note that the maximum delay time is 150ms, as RSTB goes high when either the internal timer or externally set timer times out, so if tRSTB is set externally for 200ms, the reset delay will still be 150ms. Thus for a 150ms delay, DLYB should be grounded, and for a delay time 2006 Semtech Corp. t RSTB = 7 C DLYB • 1 . 25 = 416 ,667 • C DLYB 3 • 10 − 6 www.semtech.com SC1452 POWER MANAGEMENT Applications Information (Cont.) less than 150ms, C DLYB can be calculated using the equation above, or read from the chart below. 1000 For all practical purposes, equation (1) can be reduced to the following expression: PD (MAX ) = (VIN (MAX ) − VOUTA (MIN ) )• IOUTA ( MAX ) (2) + (VIN ( MAX ) − VOUTB ( MIN ) )• IOUTB (MAX ) tRSTB = 150ms max. tRSTB (ms) 100 Looking at a typical application: VIN(MAX) = 4.2V VOUTA = 3V - 2% (worst case) = 2.94V VOUTB = 3.3V - 2% (worst case) = 3.234V IOUTA = IOUTB = 150mA TA = 85°C Inserting these values into equation (2) above gives us: 10 1 0.1 0.01 0.1 1 10 100 PD(MAX ) = (4.2 − 2.94 ) • 0.15 + (4.2 − 3.234 ) • 0.15 1000 = 0.189 + 0.145 = 0.334 W CDLYB (nF) Component Selection Using this figure, we can calculate the maximum thermal impedance allowable to maintain TJ ≤ 125°C: Output capacitor - Semtech recommends a minimum capacitance of 1µF at the output with an equivalent series resistance (ESR) of < 1Ω over temperature. The SC1452 has been designed to be used with ceramic capacitors, but does not have to be used with ceramic capacitors, allowing the designer a choice. Increasing the bulk capacitance will further reduce output noise and improve the overall transient response. θJA (MAX ) = = PD(MAX ) (125 − 85) Layout Considerations While layout for linear devices is generally not as critical as for a switching application, careful attention to detail will ensure reliable operation. 1) Attaching the part to a larger copper footprint will enable better heat transfer from the device, especially on PCBs where there are internal ground and power planes. 2) Place the input, output and bypass capacitors close to the device for optimal transient response and device behaviour. Thermal Considerations The worst-case power dissipation for this part is given by: (1) + VIN (MAX ) • IQ (MAX ) 2006 Semtech Corp. − TA (MAX ) ) With the standard MSOP-10 Land Pattern shown at the end of this datasheet, and minimum trace widths, the thermal impedance junction to ambient for SC1452 is 113°C/W. Thus no additional heatsinking is required for the above conditions. The junction temperature can be further reduced by using larger trace widths and connecting pcb copper area to the GND pin (pin 3), which connects directly to the device substrate. Lower junction temperatures improve overall output voltage accuracy. Bypass capacitor - Semtech recommends the use of a 10nF ceramic capacitor to bypass the bandgap reference. Increasing this capacitor to 100nF will further improve power supply rejection. CBYP may be omitted if low noise operation is not required. + (VIN (MAX ) − VOUTB (MIN ) )• IOUTB (MAX ) J( MAX ) 0.334 = 120°C / W Input capacitor - Semtech recommends the use of a 1µF ceramic capacitor at the input. This allows for the device being some distance from any bulk capacitance on the rail. Additionally, input droop due to load transients is reduced, improving overall load transient response. PD(MAX ) = (VIN (MAX ) − VOUTA (MIN ) )• IOUTA (MAX ) (T 8 www.semtech.com SC1452 POWER MANAGEMENT Applications Information (Cont.) 3) Connect all ground connections directly to the ground plane. If there is no ground plane, connect to a common local ground point before connecting to board ground. Enable Input Voltage vs. Junction Temperature vs. Input Voltage 1.6 VIH @ VIN = 6.5V 1.4 VIH @ VIN = 4V VEN (V) 1.2 1.0 VIL @ VIN = 6.5V 0.8 VIL @ VIN = 4V 0.6 0.4 -50 Typical Characteristics 0 25 75 100 Output Voltage vs. Output Current Output Voltage vs. Junction Temperature vs. Junction Temperature vs. Output Current 125 0 TJ = 25°C -2 VOUT Deviation (mV) -2 -4 -6 TJ = -40°C -8 -10 VIN = VOUT + 1V -4 Top to bottom: IOUT = 1mA IOUT = 50mA IOUT = 100mA IOUT = 150mA -6 -8 -10 TJ = 125°C VIN = VOUT + 1V -12 -12 0 25 50 75 100 125 -50 150 -25 0 25 50 75 100 125 TJ (°C) IOUT (mA) Dropout Voltage vs. Output Current Dropout Voltage vs. Junction Temperature vs. Junction Temperature vs. Output Current 200 200 175 175 150 150 125 125 VD (mV) VD (mV) 50 TJ (°C) 0 VOUT Deviation (mV) -25 100 75 IOUT = 150mA 100 75 Top to bottom: TJ = 125°C TJ = 25°C TJ = -40°C 50 25 50 IOUT = 50mA 25 0 0 0 25 50 75 100 125 150 -50 IOUT (mA) 2006 Semtech Corp. -25 0 25 50 75 100 125 TJ (°C) 9 www.semtech.com SC1452 POWER MANAGEMENT Typical Characteristics (Cont.) 10 Line Regulation vs. Load Regulation vs. Junction Temperature Junction Temperature 10 IOUT = 1mA 9 8 8 VIN = VOUT + 1V to 6.5V 7 REG(LOAD) mV 7 REG(LINE) (mV) VIN = VOUT + 1V IOUT = 0.1mA to 150mA 9 6 5 4 3 6 5 4 3 2 2 VIN = VOUT + 1V to 5.5V 1 1 0 0 -50 -25 0 25 50 75 100 125 -50 -25 0 25 50 Current Limit vs. Junction Temperature Off-State Quiescent Current vs. Input Voltage vs. Junction Temperature 0.80 400 0.75 350 VIN = 6.5V 0.70 300 0.65 250 0.60 VIN = 4V 100 125 100 125 VIN = 6.5V VENA = VENB = 0V 200 0.55 150 0.50 100 0.45 50 0.40 0 -50 -25 0 25 50 75 100 125 -50 -25 0 25 TJ (°C) 50 75 TJ (°C) Quiescent Current vs. Junction Temperature Quiescent Current vs. Junction Temperature vs. Output Current vs. Input Voltage 200 VIN = 6.5V 200 IOUTA = IOUTB = 150mA 175 175 150 150 125 125 IOUTA or IOUTB = 150mA IQ (µA) IQ (µA) 75 TJ (°C) IQ (nA) ILIM (mA) TJ (°C) 100 Top to bottom: VIN = 6.5V VIN = 5V VIN = 4V 100 75 75 50 50 25 25 0 IOUTA = IOUTB = 150mA 0 -50 -25 0 25 50 75 100 125 -50 TJ (°C) 2006 Semtech Corp. -25 0 25 50 75 100 125 TJ (°C) 10 www.semtech.com SC1452 POWER MANAGEMENT Typical Characteristics (Cont.) Bypass Start-up Rise Time vs. Junction Temperature Reset Threshold Voltage vs. Input Voltage vs. Junction Temperature 2.00 94 CBYP = 10nF 1.75 1.50 VTH(RST) (%VOUT) VIN = 4V 1.25 1.00 VIN = 6.5V 0.75 92 91 90 VOUT falling 0.50 89 0.25 0.00 88 -50 -25 0 25 50 75 100 -50 125 -25 0 25 75 100 Delay Source Current and Voltage Threshold vs. Junction Temperature vs. Junction Temperature 4.0 VOUT + 1V ≤ VIN ≤ 6.5V 175 1.275 VOUT + 1V ≤ VIN ≤ 6.5V 3.8 tRSTB, DLYB = 0V 1.270 3.6 150 IDLYB (µA) 125 100 75 tRSTA 50 25 tRSTB, CDLYB = 10nF 0 1.265 IDLYB 3.4 1.260 3.2 1.255 3.0 1.250 VTH(DLYB) 2.8 1.245 2.6 1.240 2.4 1.235 2.2 1.230 2.0 -50 -25 0 25 50 75 100 -50 125 -25 0 75 1.225 125 100 Output Spectral Noise Density vs. Frequency Frequency vs. Output Voltage vs. Output Capacitance 10 Top to bottom: VOUT = 3.3V VOUT = 3.0V VOUT = 2.8V VOUT = 2.5V VOUT = 1.8V 1 en (µV/√Hz) 1 en (µV/√Hz) 50 Output Spectral Noise Density vs. 10 VIN = VOUT + 1V IOUT = 50mA CIN = 1µF CBYP = 10nF COUT = 2.2µF TJ = 25°C 0.01 0.01 25 TJ (°C) TJ (°C) 0.1 125 Reset Delay Times 200 tRST (ms) 50 TJ (°C) TJ (°C) 0.1 10 100 VOUT = 3V VIN = 4V IOUT = 50mA CBYP = 10nF CIN = 1µF TJ = 25°C 0.001 0.01 1000 0.1 Left to right: COUT = 44µF COUT = 22µF COUT = 10µF COUT = 2.2µF 1 10 100 1000 f (kHz) f (kHz) 2006 Semtech Corp. 0.1 0.01 1 VTH(DLYB) (V) tr (ms) VOUT rising 93 11 www.semtech.com SC1452 POWER MANAGEMENT Typical Characteristics (Cont.) Output Spectral Noise Density vs. Frequency Output Spectral Noise Density vs. Frequency vs. Bypass Capacitance vs. Output Current 10 10 VOUT = 1.8V VIN = 2.8V IOUT = 50mA CIN = 1µF COUT = 2.2µF TJ = 25°C 1 en (µV/√Hz) en (µV/√Hz) 1 CBYP = 100pF CBYP = 1nF CBYP = 10nF CBYP = 100nF CBYP = 1µF 0.1 0.01 0.01 Top to bottom: IOUT = 150mA IOUT = 100mA IOUT = 50mA IOUT = 1mA 0.1 VOUT = 1.8V VIN = 2.8V CIN = 1µF CBYP = 10nF COUT = 2.2µF TJ = 25°C 0.01 0.1 1 10 100 0.001 0.01 1000 0.1 1 PSRR vs. Frequency vs. Output Voltage (CBYP = 10nF) (CBYP = 100nF) 75 70 70 65 65 60 60 55 55 50 40 35 30 100 PSRR vs. Frequency vs. Output Voltage 75 45 10 VIN = VOUT + 1V CIN = COUT = 1µF CBYP = 10nF IOUT = 1mA TJ = 25°C 25 0.01 0.1 Top to bottom: VOUT = 1.8V VOUT = 2.5V VOUT = 2.8V VOUT = 3.0V VOUT = 3.3V 1 10 50 45 40 35 30 100 VIN = VOUT + 1V CIN = COUT = 1µF CBYP = 100nF IOUT = 1mA TJ = 25°C 25 0.01 1000 f (kHz) 2006 Semtech Corp. 1000 f (kHz) PSRR (dB) PSRR (dB) f (kHz) 0.1 Top to bottom: VOUT = 1.8V VOUT = 2.5V VOUT = 2.8V VOUT = 3.0V VOUT = 3.3V 1 10 100 1000 f (kHz) 12 www.semtech.com SC1452 POWER MANAGEMENT Evaluation Board Schematic J1 J2 ENA J3 RIPPLE A J4 RIPPLE B 1 2 3 4 5 1 2 3 4 5 ENB JP1 JP2 1 2 3 1 2 3 OUTA ENABLE J5 VIN OUTB ENABLE U1 J6 1 2 OUTA J7 3 4 OUTB J8 5 RSTA J9 R3 Open R4 Open OUTA IN OUTB ENA GND BYP RSTA ENB RSTB DLYB 10 9 8 R1 10k 7 6 R2 10k SC1452xIMS C2 2.2uF C3 2.2uF RSTB C4 1uF JP3 1 2 C5 10nF C6 10nF + C1 220uF IQ MON JP4 150mA Short JP5 1 2 3 R5 (1) 1 2 3 R6 (1) OUTB LOAD OUTA LOAD 150mA Short J10 OUTB LOAD DRV U2 8 7 6 5 D D D D S S S G NOTE: (1) See table below for resistor values 1 2 3 4 JP6 1 2 3 EN Output Voltage 1.8 2.5 2.8 3.0 3.3 OFF OUTB LOAD Si4410 R (Ohms) (1W) 12 16 18 20 22 J11 OUTA LOAD DRV J12 GND U3 8 7 6 5 D D D D S S S G 1 2 3 4 Si4410 J13 GND J14 GND J15 GND J16 GND J17 GND J18 GND JP7 1 2 3 EN OFF OUTA LOAD Evaluation Board Gerber Plots Top Copper 2006 Semtech Corp. Bottom Copper 13 www.semtech.com SC1452 POWER MANAGEMENT Evaluation Board Gerber Plots (Cont.) Top Silk Screen Evaluation Board Bill of Materials Quantity Reference Part/Description Vendor 1 C1 220µF, 10V Various 2 C 2, C 3 2.2µF ceramic Murata GRM42-6X7R225K16 1 C4 1µF ceramic Murata GRM42-6X7R105K25 2 C 5, C 6 10nF ceramic Various 2 J1 , J2 Test pin Various White 2 J3 , J4 BNC socket Various VOUT ripple monitor 3 J5 - J7 Test pin Various Red 2 J8 , J9 Test pin Various Yellow 2 J10, J11 Test pin Various Orange 7 J1 2 - J1 8 Test pin Various Black 6 JP 1 , JP 2 , JP 4 - JP 7 Header, 3 pin Various 1 JP 3 Header, 2 pin Various 2 R1, R2 10kΩ, 1/10W Various 2 R3, R4 Not placed 2 R5, R6 See schematic Various 1 U1 SC1452xIMS Semtech 2 U2, U3 S i 4410 Vishay 2006 Semtech Corp. 14 Notes 1W www.semtech.com SC1452 POWER MANAGEMENT Outline Drawing - MSOP-10 DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX e A DIM D 2X E/2 ccc C 2X N/2 TIPS E E1 PIN 1 INDICATOR .043 .000 .006 .030 .037 .007 .011 .003 .009 .114 .118 .122 .114 .118 .122 .193 BSC .020 BSC .016 .024 .032 (.037) 10 8° 0° .004 .003 .010 A A1 A2 b c D E1 E e L L1 N 01 aaa bbb ccc N 12 B 1.10 0.00 0.15 0.75 0.95 0.17 0.27 0.08 0.23 2.90 3.00 3.10 2.90 3.00 3.10 4.90 BSC 0.50 BSC 0.40 0.60 0.80 (.95) 10 0° 8° 0.10 0.08 0.25 D aaa C SEATING PLANE A2 H A bxN bbb c GAGE PLANE A1 C C A-B D 0.25 L (L1) DETAIL SEE DETAIL SIDE VIEW 01 A A NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DATUMS -A- AND -B- TO BE DETERMINED AT DATUM PLANE -H3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 4. REFERENCE JEDEC STD MO-187, VARIATION BA. Land Pattern - MSOP-10 X DIM (C) G C G P X Y Z Z Y DIMENSIONS INCHES MILLIMETERS (.161) .098 .020 .011 .063 .224 (4.10) 2.50 0.50 0.30 1.60 5.70 P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. Contact Information Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 2006 Semtech Corp. 15 www.semtech.com