CM9153

CM9153 CALMIRCO | Alldatasheet

Document overview

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Technical content

Features

3.0V to 6.5V input voltage range Two mode operation; 1x and 1.5x Fixed 4.5V output with initial accuracy of ± 2% Supports 150mA (@4V) continuous output current High efficiency at both high and low input voltages Low external parts count, requires no inductor PWM brightness control via the ENA pin 650-kHz switching frequency Low shutdown current of <1µA Soft start prevents excessive inrush current Over temperature and over current protection Low output ripple (<1%), low EMI Input protection provides superior ESD rating, requiring only standard handling precautions TDFN-8 or MSOP-8 package Optional RoHS compliant lead free packageing

Applications

Drive white LEDs to backlight color LCDs Drive white or RGB LEDs for camera flash Cellular phones MP3 players PDAs, GPS Product Description The CM9153 is an efficient 1.5x switched capacitor (charge pump) regulator ideal for white LED applica- tions. It has a regulated 4.5V, 120mA output, capable of driving up to six parallel white LEDs. With a typical operating input voltage range from 3.0V to 6.0V, the CM9153 can be operated from a single cell Li-Ion bat- tery. It features an efficient, 1.5x charge pump circuit that uses only two 1.0μF ceramic bucket capacitors and two small capacitors for VIN and VOUT. The LED brightness can be adjusted by applying a PWM signal on the ENA pin. The CM9153 output voltage is regulated to 4.5V, ± 5% over the line and load ranges. Up 150mA of output cur- rent is available. A proprietary design architecture (patent pending) maintains high efficiency (> 80%), at both below 3.2 VIN, resulting in longer battery life, and above 5.25 VIN, when an adapter is plugged in, keep- ing the part cool. It offers low output voltage ripple, typ- ically less than 50mV. Internal over-temperature and over-current management provide short circuit protec- tion. The CM9153 is packaged in either a space-saving 8- lead TDFN or 8-lead MSOP package. It can operate over the industrial temperature range of –25°C to 85°C. 1.0uF 1.0uF 4.5V 3.0V to 6.0V 1.0uF C1P VOUT VIN C1N C2P GND ENA C2N CM9153 1.0uF PhotonICTM Typical Application Charge Pump White LED Driver

© 2006 California Micro Devices Corp. All rights reserved. 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 l Tel: 408.263.3214 l Fax: 408.263.7846 l www.cmd.com 04/26/06 CM9153 PRELIMINARY

Ordering Information

Note 1: Parts are shipped in Tape & Reel form unless otherwise specified. Specifications PACKAGE / PINOUT DIAGRAM Note: This drawing is not to scale.

8 Lead MSOP Package

8 Lead TDFN Package

(Pins Up View) TOP VIEW (Pins Down View) CM9153-01MR PART NUMBERING INFORMATION Leads Package Lead-free Finish Ordering Part Number1 Part Marking TDFN CM9153-01DE MSOP CM9153-01MR ABSOLUTE MAXIMUM RATINGS PARAMETER RATING UNITS ESD Protection (HBM) ± 2 kV VIN to GND [GND - 0.3] to +6.5 V Pin Voltages VOUT to GND C1P, C1N to GND C2P, C2N to GND [GND - 0.3] to +6.0 [GND - 0.3] to +4.5 [GND - 0.3] to +4.5 V V V Storage Temperature Range -65 to +150 Operating Temperature Range -40 to +85 Lead Temperature (Soldering, 10s) 300 Package Pinout

© 2006 California Micro Devices Corp. All rights reserved. 04/26/06 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 l Tel: 408.263.3214 l Fax: 408.263.7846 l www.cmd.com CM9153 PRELIMINARY ELECTRICAL OPERATING CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN VIN Supply Voltage 3.0 6.0 V ISD Shut-Down Supply Current ENA = 0 µA IQ Quiescent Current 1600 2500 µA charge pump Circuit VR LOAD Load Regulation Fs = 650 kHz, Iout = 0 mA to 120 mA, Vin = 3.2V to 6.5V Iout = 0 mA to 90 mA, Vin = 3.0V to 3.2V 4.2 4.0 4.5 4.1 4.7 4.2 V V VR LIN Line Regulation Iout = 60 mA, Vin = 3.2V to 6.5V Vin = 3.0V to 3.2V 4.4 4.0 4.5 4.1 4.6 4.3 V V IOUT Output Current Vout = 4.5V Vout = 4.0V 120 150 mA mA VOUTR Output Ripple Voltage Iout = 60 mA mV fs Switching Frequency 650 kHz CLK High Level Input Voltage 1.2 V Low Level Input Voltage 0.6 V ENA VIH High Level Input Voltage 1.3 V VIL Low Level Input Voltage 0.4 V Protection ILIM Over-current Limit 400 600 mA TJSD Over-temperature Limit 135 THYS Over-temperature Hystere- sis Specifications (cont’d)

© 2006 California Micro Devices Corp. All rights reserved. 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 l Tel: 408.263.3214 l Fax: 408.263.7846 l www.cmd.com 04/26/06 CM9153 PRELIMINARY CIN=COUT=C1=C2=1.0μF, TA=25 °C, unless specified Line Regulation Iout=120mA 4.0 4.1 4.2 4.3 4.4 4.5 4.6 3.00 4.00 5.00 6.00 Vin (V) Vout (V) Line Regulation Iout=60mA 4.0 4.1 4.2 4.3 4.4 4.5 4.6 3.00 4.00 5.00 6.00 Vin (V) Vout (V) Load Regulation 4.00 4.25 4.50 4.75 110 Load Current (mA) Vout (V)

3.6 Vin

3.4 Vin

5 Vin

3.0 3.5 4.0 4.5 5.0 5.5 6.0 Input Voltage (V) Efficiency (%) Iout=60mA Efficiency 100 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Input Voltage (V) Efficiency (%) Iout=120mA Switching Frequency - 650kHz 610 630 650 670 690 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 Input Voltage (V) Frequency (kHz) -40ºC 20ºC 85ºC Typical Performance Curves

© 2006 California Micro Devices Corp. All rights reserved. 04/26/06 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 l Tel: 408.263.3214 l Fax: 408.263.7846 l www.cmd.com CM9153 PRELIMINARY CIN=COUT=C1=C2=1.0μF, TA=25°C, unless specified Vout vs. Temperature 4.450 4.475 4.500 4.525 4.550 -40 -15 Temperature (ºC) Vout (V) Vin = 3.6V No Load Input Current 400 800 1200 1600 2000 3.2 3.6 4.0 4.4 4.8 5.2 5.6 6.0 Vin (V) Iq (ȝA) Startup 1 ms/div Iin, 200 mA/div Vout, 2V/div Vin, 2V/div Vin=3.8V Iout=120 mA Iout=60 mA 100 mV/div Vin = 3.8V Output Ripple Typical Performance Curves (cont’d)

© 2006 California Micro Devices Corp. All rights reserved. 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 l Tel: 408.263.3214 l Fax: 408.263.7846 l www.cmd.com 04/26/06 CM9153 PRELIMINARY Pin Descriptions 4.5V LDO Pre- R egulator 1.5x Charge Pump OSC Driver VIN ENA C1P C1N C2P C2N VOUT GND 1.0uF 1.0uF 1.0uF 1.0uF 3.0V TO 6.0V CM9153 PIN DESCRIPTIONS LEAD(s) NAME

DESCRIPTION

This pin is the plus side of charge pump bucket capacitor C2. Connect a 1.0µF ceramic capacitor between C2N and C2P. VOUT The regulated 4.5V output voltage pin. This pin requires a 1.0µF or larger ceramic capacitor to ground. This pin connects to the anodes of the LEDs. C1P This pin is the plus side of charge pump bucket capacitor C1. Connect a 1.0µF ceramic capacitor with a voltage rating of 10 V or greater between C1N and C1P. VIN Positive supply voltage input pin. This voltage should be between 3.0V and 6V. This pin requires a 1.0µF or larger ceramic capacitor to ground. ENA Enable pin, active high. By applying a PWM signal to this pin, the LED brightness can be controlled. C2N This pin is the minus side of charge pump bucket capacitor C2. Connect a 1.0µF ceramic capacitor between C2N and C2P. GND Ground pin. C1N This pin is the minus side of charge pump bucket capacitor C1. Connect a 1.0µF ceramic capacitor between C1N and C1P. Functional Block Diagram

© 2006 California Micro Devices Corp. All rights reserved. 04/26/06 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 l Tel: 408.263.3214 l Fax: 408.263.7846 l www.cmd.com CM9153 PRELIMINARY The CM9153 is a switched capacitor, charge pump voltage converter ideally suited for driving white LEDs to backlight or sidelight LCD color displays for portable devices, such as cellular phones, PDAs, and any appli- cation where small space and efficiency are critical. The CM9153 charge pump is the perfect driver for such portable applications by providing efficiency, compact overall size, low system cost and minimal EMI. The CM9153 contains a linear low dropout (LDO) regu- lator followed by a 1.5x fractional charge pump that converts the nominal lithium-ion (Li-Ion) or lithium poly- mer battery voltage levels (3.6V) by a gain of 1.5 and regulates the converted voltage to 4.5V, ±-5%, enough to drive the forward voltage drop of white LEDs. The CM9153 requires only two external switched, or bucket, capacitors, plus an input and an output capaci- tor resulting in a compact, low profile design. In many applications, all these can conveniently be the same value, 1.0μF, commonly available in a compact 0805 surface mount package. The CM9153 is intended for white LED applications, but it can drive most all types of LEDs with a forward voltage drop of less than 4V. The LED current is determined by its series resistor, RLED, and is approximately: Typical white LEDs have a forward voltage drop, VFWD_LED, of 3.5V to 3.7V. Like all single junction devices, white LEDs often have poorly matched for- ward voltages. If the LEDs were put in parallel without a series resistor, the current in the paralleled branches would vary, resulting in non-uniform brightness. RLED, in addition to setting the current, compensates for this variation by functioning as a ballast resistor, providing negative feedback for each paralleled LED. CM9153 Operation When a voltage exceeding the undervoltage lockout threshold (UVLO) is applied to the VIN pin, the CM9153 initiates a softstart cycle, typically lasting 100μS. Softstart limits the inrush current while the out- put capacitors are charged during the power-up of the device. The input voltage, VIN, passes through an LDO pre- regulator that compares the output voltage to a preci- sion bandgap reference. After the LDO, the charge pump boosts the LDO voltage by 1.5 times. A feedback circuit to the LDO monitors the output voltage, and when the output voltage reaches 4.5V, the LDO output will operate at about 3V, regulating the device output at 1.5 x 3V = 4.5V. The charge pump uses two phases from the oscillator to drive internal switches that are connected to the bucket capacitors, C1 and C2, as shown in Figure 1. In the first switch position, the bucket capacitors are con- nected in series and each are charged from the LDO to a voltage of VLDO/2. The next phase changes the switch positions so that C1 and C2 are put in parallel, and places them on top of VLDO. The resulting voltage across COUT is then; VLDO+1/2VLDO = 1.5 x VLDO. Figure 1. Switch Operation

Application Information

© 2006 California Micro Devices Corp. All rights reserved. minimizes chip heating in this operating condition. ideal efficiency is simply VOUT/VIN. with some losses, are shown in Figure 2. Figure 2. Ideal efficiency curves

© 2006 California Micro Devices Corp. All rights reserved. 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 l Tel: 408.263.3214 l Fax: 408.263.7846 l www.cmd.com 04/26/06 CM9153 PRELIMINARY Camera Flash Application Many smart phones and PDAs include a digital cam- era. These compact cameras typically utilize a white LED flash to illuminate the picture subject in low light conditions. The CM9153 is easily adapted to such an application. Figure 6 is a typical application using the CM9153 as a white LED flash driver, which is ideal for this application because it is capable of driving up to 120-mA continuous current, or 200mA of pulse current, from a Li-ion battery. The One-shot is used to create a single pulse of a set duration to the ENA pin of the CM9153. The Flash LED modules shown here contain three matched white LEDs with a common anode and sepa- rated cathodes. The series resistor is chosen based on the forward drop of the module LEDs (typically 3.3V to 3.6V at the peak pulse current) and the number of par- allel modules being driven. Figure 6, Camera Flash Application Layout Guide The charge pump is rapidly charging and discharging its external capacitors, so external traces to the capac- itors should be made as wide and short as allowable to minimize inductance and high frequency ringing. The four capacitors should be located as close as practical to the charge pump, particularly C1 and C2, which have the highest dv/dt. Connect ground and power traces to the capacitors through short, low impedance paths. Use a solid ground plane, ideally on the back- side of the PCB, which it should carry only ground potential. Connect the ground side of CIN, COUT and the chip GND as close as practical. For best thermal performance, the exposed backside lead frame should be soldered to the PCB. Vin C1P VOUT VIN C1N C2P GND ENA C2N CM9153 One- shot Pulse RCATHODE RCATHODE Flash t Application Information (cont’d)

© 2006 California Micro Devices Corp. All rights reserved. 04/26/06 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 l Tel: 408.263.3214 l Fax: 408.263.7846 l www.cmd.com CM9153 PRELIMINARY TDFN-08 Mechanical Specifications The CM9153 is supplied in an 8-lead TDFN package. Dimensions are presented below. For complete information on the TDFN-08, see the Cal- ifornia Micro Devices TDFN Package Information docu- ment. =This package is compliant with JEDEC standard MO-229, variation VCCD-3 with exception of the "D2" and "E2" dimensions as called out in the table above and the "r1" dimension which is not specified in the MO-229 standard. Package Dimensions for 8-Lead TDFN PACKAGE DIMENSIONS Package TDFN JEDEC No. MO-229 (Var. VCCD-3)= Leads Dim. Millimeters Inches Min Nom Max Min Nom Max A 0.70 0.75 0.80 0.028 0.030 0.031 0.00 0.02 0.05 0.000 0.001 0.002 0.55 0.65 0.80 0.022 0.026 0.031 0.20 0.008 b 0.18 0.25 0.30 0.007 0.010 0.012 D 2.00 0.079 0.88 0.98 1.08 0.035 0.039 0.043 E 2.00 0.079 0.46 0.56 0.66 0.018 0.022 0.026 e 0.50 0.020 K 0.20 0.008 L 0.20 0.30 0.45 0.008 0.012 0.018 0.13 0.005 R 0.075 0.003 0.075 0.003 # per tube NA # per tape and reel 3000 pieces Controlling dimension: millimeters Mechanical Package Diagrams BOTTOM VIEW A 0.10 C 0.08 C SIDE VIEW TOP VIEW b L 0.10 C A B M e GND PAD D E Pin 1 Marking K R Mechanical Details

© 2006 California Micro Devices Corp. All rights reserved. 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 l Tel: 408.263.3214 l Fax: 408.263.7846 l www.cmd.com 04/26/06 CM9153 PRELIMINARY MSOP-8 Mechanical Specifications: The CM9153-01MR is supplied in a 8-pin MSOP pack- age. Dimensions are presented below. For complete information on the MSOP-8, see the Cal- ifornia Micro Devices MSOP Package Information doc- ument. Package Dimensions for MSOP-8 PACKAGE DIMENSIONS Package MSOP Pins Dimensions Millimeters Inches Min Max Min Max A 0.87 1.17 0.034 0.046 0.05 0.25 0.002 0.010 B 0.30 (typ) 0.012 (typ) C 0.18 0.007 D 2.90 3.10 0.114 0.122 E 2.90 3.10 0.114 0.122 e

0.65 BSC

0.025 BSC

H

4.90 BSC

0.193 BSC

L 0.43 0.64 0.017 0.025 # per tape and reel 4000 pieces Controlling dimension: inches Mechanical Package Diagrams E D H L END VIEW C e B A SEATING PLANE SIDE VIEW TOP VIEW Pin 1 Marking Mechanical Details (cont’d)