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CAT3200, CAT3200-5
Low Noise Regulated Charge Pump DC-DC Converter FEATURES
s Constant high frequency (2MHz) operation s 100mA output current s Regulated output voltage (5V fixed CAT3200-5, s Thermal overload shutdown protection s Low value external capacitors (1F) s Foldback current overload protection s Shutdown current less than 1A s CAT3200-5 in low profile (1mm thin) 6-lead
Adjustable CAT3200)
s Low quiescent current (1.7mA typ.) s Input voltage operation down to 2.7V s Soft start, slew rate control
SOT23 package
s CAT3200 in MSOP-8 package
APPLICATIONS
s 3V to 5V boost conversion s White LED driver s USB On-The-Go 5V supply s Local 5V supply from lower rail s Battery backup systems s Handheld portable devices
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 1F 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 batterypowered applications. A shutdown control input allows the device to be placed in power-down mode, reducing the supply current to less than 1A. 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.
TYPICAL APPLICATION
5V Output Adjustable Output
CNEG VIN IN
CPOS OUT
5V VOUT 100mA VIN IN
CNEG
CPOS OUT VOUT 100mA R1 FB GND R2
CAT3200-5
+ 3.3V ON OFF SHDN GND
CAT3200
+ 3.3V ON OFF SHDN
R VOUT = 1.27 V 1+ 1 R2
(
(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
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Doc. No. MD-5002, Rev. L
CAT3200/3200-5
ORDERING INFORMATION
Part Number CAT3200TDI-T3 CAT3200ZI-T3 CAT3200ZI-GT3 Output Voltage 5V Adjustable Adjustable Package 6-lead thin SOT23, Lead Free 8-lead MSOP, Lead Free 8-lead MSOP, NiPdAu Package Marking LN ABME ABRU Quantity per Reel 3,000 3,000 3.000
PIN DESCRIPTIONS
Designation OUT GND SHDN CNEG IN CPOS FB PGND SGND Description Regulated output voltage. Ground reference for all voltages. Shutdown control logic input (Active LOW) Negative connection for the flying capacitor. Input power supply. Positive connection for the flying capacitor. Feedback to set the output voltage. Power ground. Signal ground.
PIN CONFIGURATION
6-lead Thin SOT23
OUT GND SHDN 1 2 3 CAT3200-5 6 5 4 CPOS IN CNEG
CPOS IN CNEG PGND
1 2
8-pin MSOP
8 7
OUT FB SHDN SGND
CAT3200
3 4 6 5
Doc. No. MD-5002, Rev. L
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(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT3200/3200-5
ABSOLUTE MAXIMUM RATINGS
VIN, VOUT, SHDN, CNEG, CPOS Voltage .. -0.6V to 6.0V VOUT Short Circuit Duration ......................... Indefinite Output Current ................................................ 200mA ESD Protection (HBM) ..................................... 2000V Junction Temperature ...................................... 150C Storage Temperature Range ............. -65C to 160C Lead Soldering Temperature (10 sec) ............. 300C Power Dissipation (SOT23-6) ............................ 0.3W
Power Dissipation (8-MSOP) ............................. 0.5W
RECOMMENDED OPERATING CONDITIONS
VIN ................................................................................... 2.7V to 4.5V CIN, COUT, CFLY
..........................................................................
1F
ILOAD ................................................................................. 0 to 100mA Ambient Temperature Range ................... -40C to 85C
ELECTRICAL SPECIFICATIONS
Recommended operating conditions unless otherwise specified. CIN, COUT, CFLY are 1F ceramic capacitors and VIN is set to 3.6V. Symbol VOUT VLINE VLOAD FOSC VR IGND ISHDN VFB IFB ROL TON VIHSHDN VILSHDN IROUT ISC TSD THYST Parameter Regulated Output Line Regulation Load Regulation Switching Frequency Output Ripple Voltage Efficiency Ground Current Shutdown Input Current FB Voltage FB Input Current Open-Loop Resistance VOUT Turn-on time (10% to 90%) High Detect Shutdown Threshold Low Detect Shutdown Threshold Reverse Leakage into OUT pin Short-circuit Output Thermal Shutdown Thermal Hysteresis VOUT = 5V, Shutdown mode (Note 2) VOUT = 0V 0.4 15 80 160 20 30 ILOAD = 0mA, VIN = 3V 0.5 0.8 1.3 ms V V A mA C C ILOAD = 100mA CAT3200-5 Only ILOAD = 50mA, VIN = 3V, CAT3200-5 ILOAD = 0mA, SHDN = VIN ILOAD = 0mA, SHDN = 0V to VIN CAT3200 Only CAT3200 Only ILOAD = 100mA, VIN = 3V (Note 1) 1.22 -50 10 1.27 Conditions ILOAD 40mA, VIN 2.7 V ILOAD 100mA, VIN 3.1 V 3.1V VIN 4.5V, ILOAD = 50mA ILOAD = 10mA to 100mA, VIN = 3.6V 1.3 Min 4.8 Typ 5.0 6 20 2.0 30 80 1.6 4 1 1.32 50 2.6 Max 5.2 Units V mV mV MHz mVp-p % mA A V nA
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.
(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
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Doc No. MD-5002, Rev. L
CAT3200/3200-5
TYPICAL PERFORMANCE CHARACTERISTICS (CAT3200-5)
TAMB=25C, CIN=COUT=CFLY=1F, VIN=3.3V unless specified otherwise.
Shutdown Input Threshold vs. Supply Voltage
SHUTDOWN THRESHOLD [V] .
Ground Current vs. Supply Voltage (No Load)
2.2
GROUND CURRENT [mA]
1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 2.7 3.0 3.3 3.6 3.9 4.2 INPUT VOLTAGE [V] 4.5
2.0 1.8 1.6 1.4 1.2 2.7 3.0 3.3 3.6 3.9 INPUT VOLTAGE [V] 4.2 4.5
Line Regulation
5.2
Load Regulation
5.2
OUTPUT VOLTAGE [V] .
OUTPUT VOLTAGE [V] .
5.1 20mA Load 5.0 100mA Load 4.9
5.1 VIN = 3.2V 5.0 VIN = 3V 4.9 VIN = 2.7V 4.8
4.8 2.7 3.0 3.3 3.6 3.9 INPUT VOLTAGE [V] 4.2 4.5
0
50 100 LOAD CURRENT [mA]
150
Oscillator Frequency vs. Supply Voltage
2.6
OSCILLATOR FREQUENCY [MHz]
Efficiency
100 90
EFFICIENCY [%]
vs. Load Current
VIN= 2.7V VIN= 3.2V VIN= 3.7V
2.4 2.2 2.0 1.8
80 70 60 50 40
VIN= 4.5V
1.6 2.7 3.0 3.3 3.6 3.9 INPUT VOLTAGE [V] 4.2 4.5
30
1
10
LOAD CURRENT [mA]
100
Doc. No. MD-5002, Rev. L
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(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT3200/3200-5
TYPICAL PERFORMANCE CHARACTERISTICS (CAT3200-5)
TAMB=25C, CIN=COUT=CFLY=1F, 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
250 200 150 100 50 0 2.7 3.0 3.3 3.6 3.9 4.2 INPUT VOLTAGE [V] 4.5
Output Voltage Change vs. Temperature
OUTPUT VOLTAGE CHANGE [%] .
CURRENT LIMIT [mA] .
2
Oscillator Frequency Change vs. Temperature
4
FREQUENCY CHANGE [%] .
80 100
1 10mA Load 0
2
0
-1
-2
-2 -40 -20 0 20 40 60
TEMPERATURE [ C]
-4 -40 -20 0 20 40 60 TEMPERATURE [ C] 80 100
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Doc No. MD-5002, Rev. L
CAT3200/3200-5
BLOCK DIAGRAM
CNEG CPOS 2VIN
CNEG CPOS 2VIN
IN
2MHz Voltage Doubler
IN
2MHz Voltage Doubler
SHDN
SHDN
1.25V
+ --
EN 5V/100mA OUT FB
1.25V
+ --
100k
EN
5V 300k 100mA
OUT
SGND PGND
GND
CAT3200 Adjustable Output
CAT3200-5 5V Fixed Output
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 1F to 4.7F low ESR (Equivalent Series Resistance) ceramic capacitor. For filtering, a low ESR ceramic bypass capacitor (1F) in close proximity to the IN pin prevents noise from being injected back into the power supply. SHDN 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 SHDN 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 (1F) 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 (1F to 4.7F) 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
resistor network (400k). The feedback network will result in a reverse current of 10A to 20A 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 CAT32005 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.
Doc. No. MD-5002, Rev. L
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(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT3200/3200-5
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 nonoverlapping 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 VIN 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 160C. Once the junction temperature drops back to approximately 140C, 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: R1 VOUT = -1 R2 1.27V
Typical values for total voltage divider resistance can range from several ks up to 1M.
1
3
CPOS CNEG
2
IN
OUT FB PGND
8
VOUT R1 1.27V COUT R2
(
1 + R1 R2
)
7 4 5
6
SHDN
SGND
Figure 1: Programming the Adjustable CAT3200
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Doc No. MD-5002, Rev. L
CAT3200/3200-5
APPLICATION INFORMATION Ceramic Capacitors
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 - 40C to 85C 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 1F, 10V, Y5V ceramic capacitor in an 0603 case may not provide any more capacitance than a 0.22F, 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 Murata AVX/Kemet Vishay Kemet Taiyo Yuden www.murata.com www.avxcorp.com www.vishay.com www.kemet.com www.t-yuden.com 408.986.0424 408.573.4150 The overall junction to ambient thermal resistance (JA) for device power dissipation (PD) consists primarily of two paths in series. The first path is the junction to the case (JC) which is defined by the package style, and the second path is case to ambient (CA) 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:
TJUNC = TAMB + PD ( JC ) + PD ( CA ) = TAMB + PD ( JA )
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 JA of less than 150C/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 :
TJUNC = TAMB + PD (JA) = 85C + 0.26W (150C/W) = 85C + 39C = 124C
Phone 814.237.1431 843.448.9411
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 JA of 200C/W. This level of thermal conduction would allow up to 200mW be safely dissipated within the device.
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 160C, 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.
Doc. No. MD-5002, Rev. L
8
(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT3200/3200-5
TYPICAL APPLICATIONS
3.3 V Supply to 5 V USB Port to Regulated 5V Power Supply
4 5 3.3 V + 10% 3 SHDN CAT3200-5 GND 2 IN
6 OUT 1 5
4 IN
6 OUT 1
VOUT 5V + 4% 100mA
3
SHDN CAT3200-5 GND 2
VOUT 5V + 4%
Lithium-Ion Battery to 5V White or Blue LED Driver
4 C5 3V to 4.4V + Li-ion Battery IN
6 C+ OUT 1 100
Drive up to 5 LEDs
CAT3200-5
100
100
100
100
ON OFF Apply PWM Waveform for Adjustable Brightness Control
3
SHDN
SGND
2
VSHDN
t
White or Blue LED Driver with LED Current Control
1 C+ 2 3V to 4.4V + Li-ion Battery IN CAT3200
3 COUT 8
Up to 6 LEDs
FB PGND ON OFF 6 SHDN SGND
7 5 4 82 82 82 82 82
Apply PWM Waveform for Adjustable Brightness Control
VSHDN
t
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Doc No. MD-5002, Rev. L
CAT3200/3200-5
PACKAGE OUTLINE DRAWING
TSOT-23 6-Lead (TD)(1)(2)
D e
SYMBOL A A1 A2 b c D
E1 E
MIN
NOM
MAX 1.00
0.01 0.80 0.30 0.12
0.05 0.87 0.15 2.90 BSC 2.80 BSC 1.60 BSC 0.95 TYP
0.10 0.90 0.45 0.20
E E1 e L L1 L2 0 0.30
0.40 0.60 REF 0.25 BSC
0.50
8
TOP VIEW
A2 A
b
A1 L1
L
c
L2
SIDE VIEW
END VIEW
For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf.
Note: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC standard MO-193.
Doc. No. MD-5002, Rev. L
10
(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT3200/3200-5
MSOP 8-Lead 3.0 x 3.0mm (Z)(1)(2)
SYMBOL MIN NOM MAX
A A1 A2 b c D E
E E1
1.10 0.05 0.75 0.22 0.13 2.90 4.80 2.90 0.40 3.00 4.90 3.00 0.65 BSC 0.60 0.95 REF 0.25 BSC 0 6 0.80 0.10 0.85 0.15 0.95 0.38 0.23 3.10 5.00 3.10
E1 e L L1 L2
TOP VIEW
D
A
A2
DETAIL A
A1
e SIDE VIEW
b
c END VIEW
L2 L L1 DETAIL A
For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf.
Note: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC standard MO-187.
(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
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Doc No. MD-5002, Rev. L
REVISION HISTORY
Date 06/17/2004 09/3/2004 09/23/2004 10/26/2004 10/29/2004 02/1/2005 02/28/2005 03/18/2005 09/22/2005 01/11/2006 08/01/2006 10/29/2007 Rev. A B C D E F G H I J K L Reason Initial Release Update Ordering Information Minor change Removed TDFN package, minor changes Added Green Packages Update 6-lead SOT-23 mechanical package drawing Update Ordering Information Update Ordering Information Update Ordering Information Update Ordering Information Change MSOP Tape&Reel Update Ordering Information Update Package Outline Drawings Add MD- to Document Number
Copyrights, Trademarks and Patents
(c) Catalyst Semiconductor, Inc. Trademarks and registered trademarks of Catalyst Semiconductor include each of the following: Adaptive AnalogTM, Beyond MemoryTM, DPPTM, EZDimTM, LDDTM, MiniPotTM, Quad-ModeTM and Quantum Charge ProgrammableTM Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products.
CATALYST SEMICONDUCTOR MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.
Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where personal injury or death may occur. Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets labeled "Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale. Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate typical semiconductor applications and may not be complete.
Catalyst Semiconductor, Inc. Corporate Headquarters 2975 Stender Way Santa Clara, CA 95054 Phone: 408.542.1000 Fax: 408.542.1200 www.catsemi.com
Publication #: Revison: Issue date:
MD-5002 L 10/29/07

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