CAT3200TDI-T3

CAT3200_07 CATALYST | Alldatasheet

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© Catalyst Semiconductor, Inc. Characteristics subject to change without notice 1 Doc. No. MD-5002, Rev. L CAT3200, CAT3200-5 Low Noise Regulated Charge Pump DC-DC Converter

DESCRIPTION

The CAT3200 and CAT3200-5 are switched capacitor boost converters that deliver a low noise, regulated output voltage. The CAT3200-5 gives a fixed regulated 5V output. The CAT3200 has an adjustable output using external resistors. The constant frequency 2MHz charge pump allows small 1µF ceramic capacitors to be used. Maximum output loads of up to 100mA can be supported over a wide range of input supply voltages (2.7V to 4.5V) making the device ideal for battery- powered applications.

FEATURES

I Constant high frequency (2MHz) operation I 100mA output current I Regulated output voltage (5V fixed CAT3200-5, Adjustable CAT3200) I Low quiescent current (1.7mA typ.) I Input voltage operation down to 2.7V I Soft start, slew rate control I Thermal overload shutdown protection I Low value external capacitors (1µF) I Foldback current overload protection I Shutdown current less than 1µA I CAT3200-5 in low profile (1mm thin) 6-lead SOT23 package I CAT3200 in MSOP-8 package

APPLICATIONS

I 3V to 5V boost conversion I White LED driver I USB On-The-Go 5V supply A shutdown control input allows the device to be placed in power-down mode, reducing the supply current to less than 1µA. In the event of short circuit or overload conditions, the device is fully protected by both foldback current limiting and thermal overload detection. In addition, a soft start, slew rate control circuit limits inrush current during power-up. The CAT3200-5 is available in a 6-lead, 1mm max thin SOT23 package. The CAT3200 is available in an 8-lead MSOP package. I Local 5V supply from lower rail I Battery backup systems I Handheld portable devices TYPICAL APPLICATION CAT3200-5 CNEG CPOS IN OUT ON OFF SHDN GND 5V Output 3.3V CAT3200 CNEG CPOS IN OUT ON OFF SHDN GND 3.3V VIN 100mA VOUT Adjustable Output VIN FB R 1 R 2 100m A VOUT VOUT = 1.27 V 1+ ( (R 1 R 2

2Doc. No. MD-5002, Rev. L © Catalyst Semiconductor, Inc. Characteristics subject to change without notice PIN CONFIGURATION

ORDERING INFORMATION

OUT Regulated output voltage. GND Ground reference for all voltages. SHDN Shutdown control logic input (Active LOW) CNEG Negative connection for the flying capacitor. IN Input power supply. CPOS Positive connection for the flying capacitor. FB Feedback to set the output voltage. PGND Power ground. SGND Signal ground. rebmuNtraPe gatloVtuptuOe gakcaPg nikraMegakcaP ytitnauQ leeRrep 3T-IDT0023TACV 5e erFdaeL,32TOSnihtdael-6N L0 00,3 3T-IZ0023TACe lbatsujdAe erFdaeL,POSMdael-8E MBA0 00,3 3TG-IZ0023TACe lbatsujdAu AdPiN,POSMdael-8U RBA0 00.3

3 Doc No. MD-5002, Rev. L© Catalyst Semiconductor, Inc. Characteristics subject to change without notice Note 1: ROL = (2VIN - VOUT )/IOUT Note 2: In the event of a controlled shutdown, the output will be isolated from the input, but will remain connected to the internal resistor feedback network. This will cause a small level of reverse current to flow back into the device to ground. ELECTRICAL SPECIFICATIONS Recommended operating conditions unless otherwise specified. CIN, COUT , CFLY are 1µF ceramic capacitors and VIN is set to 3.6V. ABSOLUTE MAXIMUM RATINGS VIN, VOUT , SHDN, CNEG , CPOS Voltage.. -0.6V to 6.0V RECOMMENDED OPERATING CONDITIONS Symbol Parameter Conditions Min Typ Max Units VOUT Regulated Output I LOAD ≤ 40mA, VIN ≥ 2.7 V 4.8 5.0 5.2 V ILOAD ≤ 100mA, VIN ≥ 3.1 V VLINE Line Regulation 3.1V ≤ VIN ≤ 4.5V, ILOAD = 50mA 6 mV VLOAD Load Regulation I LOAD = 10mA to 100mA, VIN = 3.6V 20 mV FOSC Switching Frequency 1.3 2.0 2.6 MHz VR Output Ripple I LOAD = 100mA 30 mVp-p Voltage CAT3200-5 Only η Efficiency I LOAD = 50mA, VIN = 3V, CAT3200-5 80 % IGND Ground Current I LOAD = 0mA, SHDN = VIN 1.6 4 mA ISHDN Shutdown Input I LOAD = 0mA, SHDN = 0V to VIN 1 µA Current VFB FB Voltage CAT3200 Only 1.22 1.27 1.32 V IFB FB Input Current CAT3200 Only -50 50 nA R OL Open-Loop I LOAD = 100mA, VIN = 3V (Note 1) 10 Ω Resistance TON VOUT Turn-on time I LOAD = 0mA, VIN = 3V 0.5 ms (10% to 90%) VIHSHDN High Detect 0.8 1.3 V Shutdown Threshold VILSHDN Low Detect 0.4 V Shutdown Threshold IROUT Reverse Leakage V OUT = 5V, Shutdown mode (Note 2) 15 30 µA into OUT pin ISC Short-circuit Output VOUT = 0V 80 mA TSD Thermal Shutdown 160 °°°°°C THYST Thermal Hysteresis 20 °°°°°C

4Doc. No. MD-5002, Rev. L © Catalyst Semiconductor, Inc. Characteristics subject to change without notice TYPICAL PERFORMANCE CHARACTERISTICS (CAT3200-5) Shutdown Input Threshold vs. Supply Voltage 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 INPUT VOLTAGE [V] SHUTDOWN THRESHOLD [V] . Ground Current vs. Supply Voltage (No Load) 1.2 1.4 1.6 1.8 2.0 2.2 INPUT VOLTAGE [V] GROUND CURRENT [mA] Line Regulation 4.8 4.9 5.0 5.1 5.2 INPUT VOLTAGE [V] OUTPUT VOLTAGE [V] . 20mA Load 100mA Load Load Regulation 4.8 4.9 5.0 5.1 5.2 05 01 0 0 1 5 0 LOAD CURRENT [mA] OUTPUT VOLTAGE [V] .VIN = 2.7V VIN = 3V VIN = 3.2V Oscillator Frequency vs. Supply Voltage 1.6 1.8 2.0 2.2 2.4 2.6 INPUT VOLTAGE [V] OSCILLATOR FREQUENCY [MHz] Efficiency vs. Load Current 100 1 10 100 LOAD CURRENT [mA] VIN= 2.7V VIN= 3.7V VIN= 4.5V VIN= 3.2V EFFICIENCY [%] TAMB =25°C, CIN=C OUT =C FLY =1µF, VIN=3.3V unless specified otherwise.

5 Doc No. MD-5002, Rev. L© Catalyst Semiconductor, Inc. Characteristics subject to change without notice TYPICAL PERFORMANCE CHARACTERISTICS (CAT3200-5) TAMB =25°C, CIN=C OUT =C FLY =1µF, VIN=3.3V unless specified otherwise. Soft Start Power Up (90mA Load, 3.3V Input) Load Step Response (3.3V Input) Output Ripple (100mA Load, 3.3V Input) Short Circuit Current vs Supply Voltage 100 150 200 250 INPUT VOLTAGE [V] CURRENT LIMIT [mA] . Output Voltage Change vs. Temperature -40 -20 0 20 40 60 80 100 TEMPERATURE [ C] OUTPUT VOLTAGE CHANGE [%] . 10mA Load Oscillator Frequency Change vs. Temperature - 4 0 - 2 0 0 2 04 06 08 0 1 0 0 TEMPERATURE [ C] FREQUENCY CHANGE [%] .

6Doc. No. MD-5002, Rev. L © Catalyst Semiconductor, Inc. Characteristics subject to change without notice resistor network (400kΩ ). The feedback network will result in a reverse current of 10µA to 20µA to flow back through the device to ground. Whenever the device is taken out of shutdown mode, the output voltage will experience a slew rate controlled power-up. Full operating voltage is typically achieved in less than 0.5 msec. GND is the ground reference for all voltages on CAT3200- 5 devices. FB (CAT3200 Only) is the feedback input pin. An output divider should be connected from OUT to FB to program the output voltage. PGND (CAT3200 Only). Is the same as GND for the CAT3200-5 except for the internal reference connection to SGND. SGND (CAT3200 Only) Ground pin for the internal reference. The CNEG connection is switched to this pin during the normal charge pump operation. PIN FUNCTIONS IN is the power supply. During normal operation the device draws a supply current which is almost constant. A very brief interval of non-conduction will occur at the switching frequency. The duration of the non-conduction interval is set by the internal non-overlapping “break-before-make” timing. IN should be bypassed with a 1µF to 4.7µF low ESR (Equivalent Series Resistance) ceramic capacitor. For filtering, a low ESR ceramic bypass capacitor (1µF) in close proximity to the IN pin prevents noise from being injected back into the power supply. SHDNSHDNSHDNSHDNSHDN is the logic control input (Active LOW) that places the device into shutdown mode. The internal logic is CMOS and the pin does not use an internal pull-down resistor. The SHDNSHDNSHDNSHDNSHDN pin should not be allowed to float. CPOS, CNEG are the positive and negative connections respectively for the charge pump flying capacitor. A low ESR ceramic capacitor (1µF) should be connected between these pins. During initial power-up it may be possible for the capacitor to experience a voltage reversal and for this reason, avoid using a polarized (tantalum or aluminum) flying capacitor. OUT is the regulated output voltage to power the load. During normal operation, the device will deliver a train of current pulses to the pin at a frequency of 2MHz. Adequate filtering on the pin can typically be achieved through the use a low ESR ceramic bypass capacitor (1µF to 4.7µF) in close proximity to the OUT pin. The ESR of the output capacitor will directly influence the output ripple voltage. When the shutdown mode is entered, the output is immediately isolated from the input supply, however, the output will remain connected to the internal feedback CAT3200 Adjustable Output CAT3200-5 5V Fixed Output BLOCK DIAGRAM EN 2MHz Voltage Doubler 1.25V SGND SHDN IN CNEG CPOS 2VIN 5V/100mA OUT PGND FB EN 2MHz Voltage Doubler 300k100k 1.25V GND SHDN IN CNEG CPOS 2VIN 100mA OUT

7 Doc No. MD-5002, Rev. L© Catalyst Semiconductor, Inc. Characteristics subject to change without notice Figure 1: Programming the Adjustable CAT3200 Typical values for total voltage divider resistance can range from several kΩ s up to 1MΩ . OUT FB PGND SGND VOUT 1.27V C OUT ( )1 + R1 CPOS CNEG IN SHDN DEVICE OPERATION The CAT3200/CAT3200-5 use a switched capacitor charge pump to boost the voltage at IN to a regulated output voltage. Regulation is achieved by sensing the output voltage through an internal resistor divider (CAT3200-5) and modulating the charge pump output current based on the error signal. A 2-phase non- overlapping clock activates the charge pump switches. The flying capacitor is charged from the IN voltage on the first phase of the clock. On the second phase of the clock it is stacked in series with the input voltage and connected to OUT. The charging and discharging the flying capacitor continues at a free running frequency of typically 2MHz. In shutdown mode all circuitry is turned off and the CAT3200/CAT3200-5 draw only leakage current from the V IN supply. OUT is disconnected from IN. The SHDN pin is a CMOS input with a threshold voltage of approximately 0.8V. The CAT3200/CAT3200-5 is in shutdown when a logic LOW is applied to the SHDN pin. The SHDN pin is a high impedance CMOS input. SHDN does not have an internal pull-down resistor and should not be allowed to float and. It must always be driven with a valid logic level. Short-Circuit and Thermal Protection The CAT3200 and CAT3200-5 have built-in short-circuit current limiting and over temperature protection. During overload conditions, output current is limited to approximately 225mA. At higher temperatures, or if the input voltage is high enough to cause excessive chip self heating, the thermal shutdown circuit shuts down the charge pump as the junction temperature exceeds approximately 160°C. Once the junction temperature drops back to approximately 140°C, the charge pump is enabled. The CAT3200and CAT3200-5 will cycle in and out of thermal shutdown indefinitely without latch-up or damage until a short-circuit on OUT is removed. Programming the CAT3200 Output Voltage (FB Pin) The CAT3200-5 version has an internal resistive divider to program the output voltage. The programmable CAT3200 may be set to an arbitrary voltage via an external resistive divider. Since it employs a voltage doubling charge pump, it is not possible to achieve output voltages greater than twice the available input voltage. Figure 1 shows the required voltage divider connection. The voltage divider ratio is given by the formula: R R V V OUT1 21 2 7 1=− .

8Doc. No. MD-5002, Rev. L © Catalyst Semiconductor, Inc. Characteristics subject to change without notice

APPLICATION INFORMATION

Ceramic capacitors of different dielectric materials lose their capacitance with higher temperature and voltage at different rates. For example, a capacitor made of X5R or X7R material will retain most of its capacitance from – 40°C to 85°C whereas a Z5U or Y5V style capacitor will lose considerable capacitance over that range. Z5U and Y5V capacitors may also have voltage coefficient causing them to lose 60% or more of their capacitance when the rated voltage is applied. When comparing different capacitors it is often useful consider the amount of achievable capacitance for a given case size rather than discussing the specified capacitance value. For example, over rated voltage and temperature conditions, a 1µF, 10V, Y5V ceramic capacitor in an 0603 case may not provide any more capacitance than a 0.22µF, 10V, X7R available in the same 0603 case. For many CAT3200/CAT3200-5 applications these capacitors can be considered roughly equivalent. The capacitor manufacturer’s data sheet should be consulted to determine what value of capacitor is needed to ensure the desired capacitance at all temperatures and voltages. Below is a list of ceramic capacitor manufacturers and how to contact them: Capacitor Manufacturer Web Phone Murata www.murata.com 814.237.1431 AVX/Kemet www.avxcorp.com 843.448.9411 Vishay www.vishay.com Kemet www.kemet.com 408.986.0424 Taiyo Yuden www.t-yuden.com 408.573.4150 Thermal Management For higher input voltages and maximum output current there can be substantial power dissipation in the CAT3200/CAT3200-5. If the junction temperature increases to 160°C, the thermal shutdown circuitry will automatically turn off the output. A good thermal connection to the PC board is recommended to reduce the chip temperature. Connecting the GND pin (Pins 4/5 for CAT3200, Pin 2 for CAT3200-5) to a ground plane, and maintaining a solid ground plane under the device reduces the overall thermal resistance. The overall junction to ambient thermal resistance (θJA) for device power dissipation (PD ) consists primarily of two paths in series. The first path is the junction to the case (θ JC) which is defined by the package style, and the second path is case to ambient (θCA ) thermal resistance which is dependent on board layout. The final operating junction temperature for any set of conditions can be estimated by the following thermal equation: TT P PJUNC AMB D JC D CA=+ + () ()ΘΘ =+TPAMB D JA ()Θ The CAT3200 in SOT23 package, when mounted on printed circuit board with two square inches of copper allocated for “heat spreading”, will result with an overall θ JA of less than 150°C/W. For a typical application operating from a 3.8V input supply, the maximum power dissipation is 260mW (100mA x 3V). This would result if a maximum junction temperature of : T = T + P ( ) = 85 C + 0.26W (150 C/W) = 85 C + 39 C = 124 C JUNC AMB D JA θ °° ° The use of multi-layer board construction with power planes will further enhance the overall thermal performance. In the event of no dedicated copper area being used for heat spreading, a multi-layer board will typically provide the CAT3200 with an overall θ JA of 200°C/W. This level of thermal conduction would allow up to 200mW be safely dissipated within the device.

9 Doc No. MD-5002, Rev. L© Catalyst Semiconductor, Inc. Characteristics subject to change without notice ON OFF C + C - IN OUT FB SGND PGND SHDN 82Ω 82Ω 82Ω 82Ω 82Ω CAT3200 VSHDN Apply PWM Waveform for Adjustable Brightness Control 3V to 4.4V Li-ion Battery t Up to 6 LEDs ON OFF C - C + IN OUT SGNDSHDN 100Ω 100Ω 100Ω 100ΩCAT3200-5 VSHDN Apply PWM Waveform for Adjustable Brightness Control 3V to 4.4V Li-ion Battery t Drive up to 5 LEDs 100Ω CAT3200-5 VOUT 5V + 4% 100mA

3.3 V + 10%

5V + 4% IN OUT SHDN GND IN OUT SHDN GND TYPICAL APPLICATIONS White or Blue LED Driver with LED Current Control Lithium-Ion Battery to 5V White or Blue LED Driver

3.3 V Supply to 5 V USB Port to Regulated 5V Power Supply

10Doc. No. MD-5002, Rev. L © Catalyst Semiconductor, Inc. Characteristics subject to change without notice θ E1 E e b D c A TOP VIEW SIDE VIEW END VIEW L SYMBOL MIN NOM MAX A 1.00 A1 0.01 0.05 0.10 A2 0.80 0.87 0.90 b 0.30 0.45 c 0.12 0.15 0.20 D 2.90 BSC E 2.80 BSC E1 1.60 BSC e 0.95 TYP L 0.30 0.40 0.50 L1 0.60 REF L2 0.25 BSC θ 0º 8º PACKAGE OUTLINE DRAWING TSOT-23 6-Lead (TD)(1)(2) Note: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC standard MO-193. For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf.

11 Doc No. MD-5002, Rev. L© Catalyst Semiconductor, Inc. Characteristics subject to change without notice MSOP 8-Lead 3.0 x 3.0mm (Z)(1)(2) θ E1E A1 e b D c A TOP VIEW SIDE VIEW END VIEW L DETAIL A DETAIL A SYMBOL MIN NOM MAX A 1.10 A1 0.05 0.10 0.15 A2 0.75 0.85 0.95 b 0.22 0.38 c 0.13 0.23 D 2.90 3.00 3.10 E 4.80 4.90 5.00 E1 2.90 3.00 3.10 e 0.65 BSC L 0.40 0.60 0.80 L1 0.95 REF L2 0.25 BSC θ 0º 6º Note: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC standard MO-187. For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf.

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REVISION HISTORY

Date Rev. Reason 06/17/2004 A Initial Release 09/3/2004 B Update Ordering Information 09/23/2004 C Minor change 10/26/2004 D Removed TDFN package, minor changes 10/29/2004 E Added Green Packages 02/1/2005 F Update 6-lead SOT-23 mechanical package drawing 02/28/2005 G Update Ordering Information 03/18/2005 H Update Ordering Information 09/22/2005 I Update Ordering Information 01/11/2006 J Update Ordering Information 08/01/2006 K Change MSOP Tape&Reel 10/29/2007 L Update Ordering Information Update Package Outline Drawings Add MD- to Document Number