KB3440 KINGBOR | Alldatasheet

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Buck-Boost DC/DC Converter Single Inductor Fixed Frequency Operation with Battery Voltages Above, Below or Equal to the Output Synchronous Rectification: Up to 96% Efficiency 40µA Quiescent Current in Burst Mode Operation Up to 600mA Continuous Output Current No Schottky Diodes Required (V OUT < 4.3V) V OUT Disconnected from V IN During Shutdown 2.5V to 5.5V Input and Output Range Programmable Oscillator Frequency from 300kHz to 2MHz Synchronizable Oscillator Burst Mode Enable Control 5 µA Shutdown Current Small Thermally Enhanced 10-Pin MSOP and (3mm 3mm) DFN Packages Palmtop Computers Handheld Instruments MP3 Players Digital Cameras The kB3440 is a high efficiency, fixed frequency, Buck- Boost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single lithium-ion, multicell alkaline or NiMH applications where the output voltage is within the battery voltage range. The device includes two 0.19 1 N-channel MOSFET switches and two 0.221 P-channel switches. Switching frequencies up to 2MHz are programmed with an external resistor and the oscillator can be synchronized to an external clock. Quiescent current is only 40 µA in Burst Mode operation, maximizing battery life in portable appli- cations. Burst Mode operation is user controlled and can be enabled by driving the MODE/SYNC pin high. If the MODE/SYNC pin has either a clock or is driven low, then fixed frequency switching is enabled. Other features include a 1µA shutdown, soft-start con- trol, thermal shutdown and current limit. The kB3440 is available in the 10-pin thermally enhanced MSOP and (3mm × 3mm) DFN packages. Efficiency vs V IN Li-Ion to 3.3V at 600mA Buck-Boost Converter SW1 V IN SHDN/SS MODE/SYNC R T SW2 V OUT FB V C GND kB3440 10µH 340k 200k 15k R T 60.4k C1: TAIYO YUDEN JMK212BJ106MG C2: TAIYO YUDEN JMK325BJ226MM L1: SUMIDA CDRH6D38-100 *1 = Burst Mode OPERATION 0 = FIXED FREQUENCY 10µF Li-Ion V IN = 2.7V TO 4.2V C5 1.5nF C2 22µF V OUT 3.3V 600mA V IN (V) 2.5 EFFICIENCY (%) 100 5.5 V OUT = 3.3V I OUT = 100mA f OSC = 1MHz Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052

APPLICATIONS

PARAMETER CONDITIONS MIN TYP MAX UNITS Input Start-Up Voltage 2.4 2.5 V Input Operating Range 2.5 5.5 V Output Voltage Adjust Range 2.5 5.5 V Feedback Voltage 1.196 1.22 1.244 V Feedback Input Current V FB = 1.22V 1 50 nA Quiescent Current, Burst Mode Operation V C = 0V, MODE/SYNC = 3V (Note 3) 40 50 µ A Quiescent Current, Shutdown SHDN = 0V, Not Including Switch Leakage 0.1 1 µ A Quiescent Current, Active V C = 0V, MODE/SYNC = 0V (Note 3) 2800 4000 µ A NMOS Switch Leakage Switches B and C 0.1 5 µ A PMOS Switch Leakage Switches A and D 0.1 10 µ A NMOS Switch On Resistance Switches B and C 0.19 1 PMOS Switch On Resistance Switches A and D 0.22 1 Input Current Limit Maximum Duty Cycle Boost (% Switch C On) 55 75 % Buck (% Switch A On) 100 % Minimum Duty Cycle Frequency Accuracy 0.8 1 1.2 MHz MODE/SYNC Threshold 0.4 2 V MODE/SYNC Input Current V MODE/SYNC = 5.5V 0.01 1 µ A Error Amp AVOL 90 dB Error Amp Source Current 15 µ A Error Amp Sink Current 380 µ A (Note 1) V IN , V OUT V C , R T , FB, SHDN/SS, ORDER PART NUMBER kB3440EDD T JMAX = 125°C, e JA = 130°C/ W 1 LAYER BOARD e JA = 100°C/ W 4 LAYER BOARD e JC = 45°C/ W The denotes specifications that apply over the full operating temperature range, otherwise specifications are at T A = 25°C. V IN = V OUT = 3.6V, R T = 60k, unless otherwise noted. DD PART MARKING XXXX R T MODE/SYNC SW1 SW2 GND V C FB SHDN/SS V IN V OUT TOP VIEW MS PACKAGE 10-LEAD PLASTIC MSOP Operating Temperature Range (Note 2) .. – 40°C to 85°C ORDER PART NUMBER kB3440EMS MS PART MARKING HX-AA TOP VIEW DD PACKAGE 10-LEAD (3mm × 3mm) PLASTIC DFN EXPOSED PAD (PIN 11) IS GND MUST BE SOLDERED TO PCB 1 V C FB SHDN/SS V IN V OUT R T MODE/SYNC SW1 SW2 GND T JMAX = 125°C, e JA = 43°C/ W, e JC = 3°C/ W kB3440 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 ABSOLUTE MAXIMUM RATINGS PACAGE/ORDER INFORMATION

ELECTRICAL CHARACTERISTICS

Li-Ion to 3.3V Efficiency OSC = 300kHz) OUTPUT CURRENT (mA) EFFICIENCY (%) 100 0.1 10 100 10001 Burst Mode OPERATION V IN = 3.3V V IN = 2.5V POWER LOSS (mW) V IN = 4.2V 0.1 100 1000 f OSC = 1MHz V IN = 3.3V OUTPUT CURRENT (mA) EFFICIENCY (%) 100 0.1 10 100 10001 Burst Mode OPERATION V IN = 2.5V V IN = 3.3V f OSC = 2MHz V IN = 4.2V Li-Ion to 3.3V Efficiency, Power Loss (f OSC = 1MHz) Li-Ion to 3.3V Efficiency OSC = 2MHz) Switch Pins During Buck/Boost Switch Pins on the Edge of Buck/Boost and Approaching Boost SW1 2V/DIV SW2 2V/DIV V IN = 3.78V 50ns/DIV V OUT = 3.3V I OUT = 250mA SW1 2V/DIV SW2 2V/DIV V IN = 3.42V 50ns/DIV V OUT = 3.3V I OUT = 250mA Switch Pins on the Edge of Buck/Boost and Approaching Buck SW1 2V/DIV SW2 2V/DIV V IN = 4.15V 50ns/DIV V OUT = 3.3V I OUT = 250mA Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. Note 2: The kB3440E is guaranteed to meet performance specifications from 0°C to 70°C. Specifications over the –40 °C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Note 3: Current measurements are performed when the outputs are not switching. PARAMETER CONDITIONS MIN TYP MAX UNITS SHDN/SS Threshold When IC is Enabled 0.4 1 1.5 V When EA is at Maximum Boost Duty Cycle 2.2 V SHDN/SS Input Current V SHDN = 5.5V 0.01 1 µA The denotes specifications that apply over the full operating temperature range, otherwise specifications are at T A = 25°C. V IN = V OUT = 3.6V, R T = 60k, unless otherwise noted. OUTPUT CURRENT (mA) EFFICIENCY (%) 100 0.1 10 100 10001 Burst Mode OPERATION V IN = 2.5V V IN = 3.3V f OSC = 300kHz V IN = 4.2V kB3440 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 TYPICAL PERFORMANCE CHARACTERISTICS

Active Quiescent Current Burst Mode Quiescent Current Error Amp Source Current TEMPERATURE (°C) –55 400 V IN + V OUT CURRENT (µA) 450 500 550 –25 5 35 65 95 125 V IN = V OUT = 3.6V TEMPERATURE (°C) –55 V IN + V OUT CURRENT (µA) –25 5 35 65 95 125 V IN = V OUT = 3.6V TEMPERATURE (°C) –55 E/A SOURCE CURRENT (µA) –25 5 35 65 95 125 V IN = V OUT = 3.6V Output Frequency NMOS R DS(ON) Feedback Voltage TEMPERATURE (°C) –55 0.90 FREQUENCY (MHz) 0.95 1.00 1.05 1.10 –25 5 35 65 95 125 V IN = V OUT = 3.6V TEMPERATURE (°C) –55 0.10 NMOS R DS(ON) (1) 0.15 0.20 0.25 0.30 –25 5 35 65 95 125 V IN = V OUT = 3.6V SWITCHES B AND C TEMPERATURE (°C) –55 1.196 FEEDBACK VOLTAGE (V) 1.216 1.236 –25 5 35 65 95 125 V IN = V OUT = 3V Switch Pins in Buck Mode V OUT Ripple During Buck, Buck/Boost and Boost Modes SW1 2V/DIV SW2 2V/DIV V IN = 5V 250ns/DIV V OUT = 3.3V I OUT = 250mA Switch Pins in Boost Mode SW1 2V/DIV SW2 2V/DIV V IN = 2.5V 250ns/DIV V OUT = 3.3V I OUT = 250mA V OUT 10mV/DIV AC Coupled L = 10µH1 µs/DIV C OUT = 22µF I OUT = 250mA f OSC = 1MHz Buck V IN = 5V Buck/Boost V IN = 3.78V Boost V IN = 2.5V kB3440 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 TYPICAL PERFORMANCE CHARACTERISTICS

Boost Max Duty Cycle Minimum Start Voltage Current Limit TEMPERATURE (°C) –55 DUTY CYCLE (%) –25 5 35 65 95 125 V IN = V OUT = 3.6V R T = 60k TEMPERATURE (°C) –55 2.25 MINIMUM START VOLTAGE (V) 2.30 2.35 2.40 –25 5 35 65 95 125 TEMPERATURE (°C) –55 1000 CURRENT LIMIT (A) 1500 2000 2500 3000 –25 5 35 65 95 125 V IN = V OUT = 3.6V PEAK SWITCH AVERAGE INPUT Feedback Voltage Line Regulation Error Amp Sink Current PMOS R DS(ON) TEMPERATURE (°C) –55 LINE REGULATION (dB) –25 5 35 65 95 125 V IN = V OUT = 2.5V TO 5.5V TEMPERATURE (°C) –55 350 E/A SINK CURRENT (µA) 370 390 410 430 –25 5 35 65 95 125 V IN = V OUT = 3.6V TEMPERATURE (°C) –55 0.10 PMOS R DS(ON) (1) 0.15 0.20 0.25 0.30 –25 5 35 65 95 125 V IN = V OUT = 3.6V SWITCHES A AND D kB3440 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 TYPICAL PERFORMANCE CHARACTERISTICS

R T (Pin 1): Timing Resistor to Program the Oscillator Frequency. The programming frequency range is 300kHz to 2MHz. f R Hz OSC T = 61 0 MODE/SYNC (Pin 2): MODE/SYNC = External CLK : Syn- chronization of the internal oscillator. A clock frequency of twice the desired switching frequency and with a pulse width between 100ns and 2 µs is applied. The oscillator free running frequency is set slower than the desired synchronized switching frequency to guarantee sync. The oscillator R T component value required is given by: R f T SW = 81 0 where f SW = desired synchronized switching frequency. SW1 (Pin 3): Switch Pin Where the Internal Switches A and B are Connected. Connect inductor from SW1 to SW2. An optional Schottky diode can be connected from SW1 to ground. Minimize trace length to keep EMI down. SW2 (Pin 4): Switch Pin Where the Internal Switches C and D are Connected. For applications with output volt- ages over 4.3V, a Schottky diode is required from SW2 to V OUT to ensure the SW pin does not exhibit excess voltage. GND (Pin 5): Signal and Power Ground for the IC. V OUT (Pin 6): Output of the Synchronous Rectifier. A filter capacitor is placed from V OUT to GND. V IN (Pin 7): Input Supply Pin. Internal V CC for the IC. A ceramic bypass capacitor as close to the V IN pin and GND (Pin 5) is required. SHDN/SS (Pin 8): Combined Soft-Start and Shutdown. Grounding this pin shuts down the IC. Tie to >1.5V to enable the IC and > 2.5V to ensure the error amp is not clamped from soft-start. An RC from the shutdown com- mand signal to this pin will provide a soft-start function by limiting the rise time of the V C pin. FB (Pin 9): Feedback Pin. Connect resistor divider tap here. The output voltage can be adjusted from 2.5V to 5.5V. The feedback reference voltage is typically 1.22V. V C (Pin 10): Error Amp Output. A frequency compensation network is connected from this pin to the FB pin to compensate the loop. See the section “Compensating the Feedback Loop” for guidelines. Exposed Pad (Pin 11, DFN Package Only): Ground. This pin must be soldered to the PCB and electrically connected to ground. kB3440 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 PIN FUNCTIONS

– + PWM LOGIC AND OUTPUT PHASING GATE DRIVERS AND ANTICROSS CONDUCTION Burst Mode OPERATION CONTROL 5µs DELAY GND UVLO 2.7A 2.4V R T SLEEP MODE/SYNC 1 = Burst Mode OPERATION 0 = FIXED FREQUENCY R T OSC SYNC SUPPLY CURRENT LIMIT SW A SW1 SW2 V IN 2.5V TO 5.5V SW D I SENSE AMP ERROR AMP 1.22V CLAMP REVERSE CURRENT LIMIT SW B SW C –0.4A V OUT FB V C SHDN/SSSHUTDOWN R SS V IN C SS V OUT 2.5V TO 5.5V PWM COMPARATORS kB3440 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 SIMPLIFIED BLOC DIAGRAM

pin determines the output duty cycle of the switches. improve peak efficiency by typically 1% to 2% at 600kHz. = desired synchronized switching frequency. amplifier to provide loop compensation for the converter. provide a soft-start function. fier delay to output is typically 50ns. modes is continuous, filtered and transparent to the user. various regions of operation will now be described. Figure 1. Simplified Diagram of Output Switches

3440 F01

= duty cycle % of the four switch range. where f = operating frequency, Hz. Figure 2. Switch Control vs Internal Control Voltage, V frequency component that depends upon load current. MODE/SYNC pin high to enable and low to disable.

3440 F02

25 A I

inductor ESR, the peak efficiency (dbm) drops to 75%. ) at the expense of DC load regulation. of the converter (see Closing the Feedback Loop).

3440 F03

3440 F04

Figure 3. Inductor Charge Cycle During Burst Mode Operation Figure 4. Inductor Discharge Cycle During Burst Mode Operation

order to handle the transient response of the converter. Sanyo POSCAP are recommended. Table 2. Capacitor Vendor Information quency core material, such as ferrite, to reduce core loses. components and Table 2 for a list of component suppliers. Table 1. Inductor Vendor Information

  • – •
  • – •
  • • • % () ( ) () () Ripple Boost IV V CV f Ripple Buck IV V CV Vf OUT MAX OUT IN MIN OUT OUT OUT MAX IN MAX OUT OUT IN MAX OUT 100 100 where C OUT = output filter capacitor, F kB3440 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 APPLICATIONS INFORMATION

Output Voltage > 4.3V A Schottky diode from SW to V OUT is required for output voltages over 4.3V. The diode must be located as close to the pins as possible in order to reduce the peak voltage on SW2 due to the parasitic lead and trace inductance. Input Voltage > 4.5V For applications with input voltages above 4.5V which could exhibit an overload or short-circuit condition, a 21/ 1nF series snubber is required between the SW1 pin and GND. A Schottky diode such as the Phillips PMEG2010EA or equivalent from SW1 to V IN should also be added as close to the pins as possible. For the higher input voltages V IN bypassing becomes more critical, therefore, a ceramic bypass capacitor as close to the V IN and GND pins as possible is also required. Operating Frequency Selection There are several considerations in selecting the operating frequency of the converter. The first is, what are the sensitive frequency bands that cannot tolerate any spec- tral noise? For example, in products incorporating RF communications, the 455kHz IF frequency is sensitive to any noise, therefore switching above 600kHz is desired. Some communications have sensitivity to 1.1MHz and in that case a 2MHz converter frequency may be employed. Other considerations are the physical size of the converter and efficiency. As the operating frequency goes up, the inductor and filter capacitors go down in value and size. The trade off is in efficiency since the switching losses due to gate charge are going up proportional with frequency. Additional quiescent current due to the output switches GATE charge is given by: Buck: 500e –12

  • V IN
  • F Boost: 250e –12
  • (V IN + V OUT ) • F Buck/Boost: F • (750e –12
  • V IN + 250e –12
  • V OUT where F = switching frequency Closing the Feedback Loop The kB3440 incorporates voltage mode PWM control. The control to output gain varies with operation region (Buck, Boost, Buck-Boost), but is usually no greater than 15. The output filter exhibits a double pole response is given by: f LC Hz in Buck e FILTER POLE OUT
  • • • mod= f V LV Hz in Boost e FILTER POLE IN OUT mod= where C OUT is the output filter capacitor. The output filter zero is given by: f RC Hz FILTER ZERO ESR OUT
  • • •= / where R ESR is the capacitor equivalent series resistance. A troublesome feature in Boost mode is the right-half plane zero (RHP), and is given by: f V IL V Hz RHPZ IN OUT OUT 2• • • • The loop gain is typically rolled off before the RHP zero frequency. A simple Type I compensation network can be incorpo- rated to stabilize the loop but at a cost of reduced band- width and slower transient response. To ensure proper phase margin, the loop requires to be crossed over a decade before the LC double pole. The unity-gain frequency of the error amplifier with the Type I compensation is given by: f RC P Hz UG = / 21 1•• • Most applications demand an improved transient response to allow a smaller output filter capacitor. To achieve a higher bandwidth, Type III compensation is required. Two zeros are required to compensate for the double-pole response. kB3440 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 APPLICATIONS INFORMATION

Figure 8. Error Amplifier with Type III Compensation

3440 F08

Figure 7. Error Amplifier with Type I Compensation

3440 F07

  • • • •
  • • •
  • • •
  • • • traces and external components. Following the recom- mendations for output voltage >4.3V and input voltage >4.5V will improve this condition. Additional short-circuit protection can be accomplished with some external cir- cuitry. In an overload or short-circuit condition the kB3440 voltage loop opens and the error amp control voltage on the V C pin slams to the upper clamp level. This condition forces boost mode operation in order to attempt to provide more output voltage and the IC hits a peak switch current limit of 2.7A. When switch current limit is reached switches B and D turn on for the remainder of the cycle to reverse the volts • seconds on the inductor. Although this prevents current run away, this condition produces four switch operation producing a current foldback characteristic and the average input current drops. The IC is trimmed to guarantee greater than 1A average input current to meet the maximum load demand, but in a short-circuit or overload condition the foldback characteristic will occur producing higher peak switch currents. To minimize this affect during this condition the following circuits can be utilized. Restart Circuit For a sustained short-circuit the circuit in Figure 9 will force a soft-start condition. The only design constraint is that R2/C2 time constant must be longer than the soft- start components R1/C1 to ensure start-up.

Figure 9. Soft-Start Reset Circuitry for a Sustained Short-Circuit

3440 F09

Low Profile (<1.1mm) Li-Ion to 3.3V at 200mA Converter SW1 V IN SHDN/SS MODE/SYNC R T SW2 V OUT FB V C GND kB3440 4.7µH 340k 200k 15k R T 30.1k C1: TAIYO YUDEN JMK212BJ475MG C2: TAIYO YUDEN JMK212BJ475MG L1: COILCRAFT LPO1704-472M *1 = Burst Mode OPERATION 0 = FIXED FREQUENCY f OSC = 2MHz 4.7µF Li-Ion V IN = 2.5V TO 4.2V 1.5nF 4.7µF V OUT 3.3V 200mA OUTPUT CURRENT (mA) EFFICIENCY (%) 100 0.1 10 100 1000 Burst Mode OPERATION V IN = 2.5V V IN = 3.3V V IN = 4.2V Efficiency 3-Cell to 5V Boost Converter with Output Disconnect SW1 V IN SHDN/SS MODE/SYNC R T SW2 V OUT FB V C GND kB3440 10µH 619k 200kR T 60.4k C1: TAIYO YUDEN JMK212BJ106MG C2: TAIYO YUDEN JMK325BJ226MM D1: ON SEMICONDUCTOR MBRM120T3 L1: SUMIDA CDRH4D28-100 *1 = Burst Mode OPERATION 0 = FIXED FREQUENCY LOCATE COMPONENTS AS CLOSE TO IC AS POSSIBLE 10µF 0.1µF CELLS R4 1M V IN = 2.7V TO 4.5V SD 1.5nF 15k f OSC = 1MHz C2 22µF V OUT 300mA D1** OUTPUT CURRENT (mA) EFFICIENCY (%) 100 0.1 10 100 1000 Burst Mode OPERATION V IN = 2.7V f OSC = 1MHz V IN = 3.6V V IN = 4.5V 3-Cell to 5V Boost Efficiency kB3440 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 TYPICAL APPLICATION

V IN SHDN/SS MODE/SYNC R T SW2 V OUT FB V C GND kB3440 3.3µH 340k 10k 200k R3 15k D1** R T 30.1k C1, C2: TAIYO YUDEN JMK212BJ106MM D1: ON SEMICONDUCTOR MBRM120T3 L1: SUMIDA CDRH4D28-3R3 *1 = Burst Mode OPERATION 0 = FIXED FREQUENCY LOCATE COMPONENTS AS CLOSE TO IC AS POSSIBLE 10µF f OSC = 2MHz Li-Ion V IN = 2.5V TO 4.2V C4 150pF C5 10pF C2 10µF V OUT 0.4V TO 5V 33pF V OUT = 3.3V – 1.7V • (V DAC – 1.22V) 200k DAC WCDMA Power Amp Power Supply with Dynamic Voltage Control Efficiency of the WCDMA Power Amp Power Supply INPUT VOLTAGE (V) 2.5 EFFICIENCY (%) 100 4.5 3 3.5 4 5 V OUT = 3.4V I OUT = 100mA I OUT = 250mA I OUT = 600mA SW1 V IN SHDN/SS MODE/SYNC R T SW2 V OUT FB V C GND kB3440 10µH 24k R T 60.4k R S 0.11 C1: TAIYO YUDEN JMK212BJ106MG C2: TAIYO YUDEN JMK325BJ226MM L1: SUMIDA CDRH-4D28-100 *1 = Burst Mode OPERATION 0 = FIXED FREQUENCY 10µF V IN 2.5V TO 5.5V USB/PCMCIA POWER 500mA MAX V OUT 3.6V (PULSED) 10nF 130k 392k 200k 1/2 LT1490A 2N3906 1/2 LT1490A 1N914 C6 TO C9 470µF 1.22 • R4 R5 • R S I CURRENTLIMIT GSM Modem Powered from USB or PCMCIA with 500mA Input Current Limit kB3440 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 TYPICAL APPLICATION

10-Lead Plastic DFN (3mm × 3mm) 3.00 ±0.10 (4 SIDES) NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2). CHECK THE KB WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 0.38 ± 0.10 BOTTOM VIEW—EXPOSED PAD 1.65 ± 0.10 (2 SIDES) 0.75 ±0.05 R = 0.115 TYP 2.38 ±0.10 (2 SIDES) 106 PIN 1 TOP MARK (SEE NOTE 6)

0.200 REF

0.00 – 0.05 (DD10) DFN 1103 0.25 ± 0.05 2.38 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 1.65 ±0.05 (2 SIDES)2.15 ±0.05 0.50 BSC 0.675 ±0.05 3.50 ±0.05 PACKAGE OUTLINE 0.25 ± 0.05

0.50 BSC

Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 PACAGE DESCRIPTION

MSOP (MS) 0603 0.53 ± 0.152 (.021 ± .006) SEATING PLANE 0.18 (.007) 1.10 (.043) MAX 0.17 – 0.27 (.007 – .011) TYP 0.127 ± 0.076 (.005 ± .003) 0.86 (.034) REF 0.50 (.0197) BSC 12 3 45 4.90 ± 0.152 (.193 ± .006) 0.497 ± 0.076 (.0196 ± .003) REF 8910 7 6 3.00 ± 0.102 (.118 ± .004) (NOTE 3) 3.00 ± 0.102 (.118 ± .004) (NOTE 4) NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 0.254 (.010) 0° – 6° TYP DETAIL “A” DETAIL “A” GAUGE PLANE 5.23 (.206) MIN 3.20 – 3.45 (.126 – .136) 0.889 ± 0.127 (.035 ± .005) RECOMMENDED SOLDER PAD LAYOUT 0.305 ± 0.038 (.0120 ± .0015) TYP 0.50 (.0197) BSC kB3440 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 PACAGE DESCRIPTION

TEL:(86)0755-26508846 FAX:(86)0755-26509052 www.kingbor.com Efficiency OUTPUT CURRENT (mA) EFFICIENCY (%) 100 0.1 10 100 10001.0 V IN = 4.2V V IN = 3.3V Burst Mode OPERATION Li-Ion to 3.3V at 600mA Buck-Boost Converter SW1 V IN SHDN/SS MODE/SYNC R T SW2 V OUT FB V C GND kB3440 10µH 340k 200k 15k R T 60.4k C1: TAIYO YUDEN JMK212BJ106MG C2: TAIYO YUDEN JMK325BJ226MM L1: SUMIDA CDRH4D28-100 *1 = Burst Mode OPERATION 0 = FIXED FREQUENCY 10µF Li-Ion V IN = 2.8V TO 4.2V C5 300pF C2 22µF V OUT 3.3V 600mA 220pF 2.2k kB3440 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 TYPICAL APPLICATION