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MAX8630ZETD25+

MAX8630ZETD25+

  • 厂商:

    AD(亚德诺)

  • 封装:

    WFDFN14

  • 描述:

    CHARGE PUMPS FOR 5 WHITE LED

  • 数据手册
  • 价格&库存
MAX8630ZETD25+ 数据手册
19-3689; Rev 1; 2/07 KIT ATION EVALU E L B A AVAIL 125mA 1x/1.5x Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN Features The MAX8630Y/MAX8630Z charge pumps drive up to 5 white LEDs with regulated constant current up to 125mA total. By utilizing adaptive 1x/1.5x charge-pump modes and very low-dropout current regulators, they achieve high efficiency over the full 1-cell Li+ battery input voltage range. The 1MHz fixed-frequency switching allows for tiny external components, and the regulation scheme is optimized to ensure low EMI and low input ripple. An integrated derating function protects the LEDs from overheating during high ambient temperatures. The MAX8630Y/MAX8630Z are factory trimmed for fullscale LED current options of 15mA, 18mA, 20mA, and 25mA. The MAX8630Z uses two enable inputs (ENM for 3 main LEDs and ENS for 2 sub LEDs) for simple on/off control and single-wire, serial-pulse dimming in 32 linear steps. The MAX8630Y uses a single direct PWM input (PWM) to control all 5 LEDs with DC current proportional to the PWM duty cycle. If both ENM and ENS (or PWM) are kept low for more than 4ms, the MAX8630_ enters shutdown. The MAX8630Y/MAX8630Z are available in a 14-pin, 3mm x 3mm TDFN package (0.8mm max height). ♦ 93% Max/85% Avg. Efficiency (PLED/PBATT) Over Li+ Battery Discharge ♦ 1% LED Current Accuracy ♦ 125mA Total Drive Capability ♦ Adaptive 1x/1.5x Mode Switchover ♦ Single-Wire, Serial-Pulse Dimming (MAX8630Z) Independent On/Off/Dimming for Main and Sub Linear—Full, 31/32nd, 30/32nd, … 1/32nd ♦ Direct-PWM Dimming (MAX8630Y) ♦ 15, 18, 20, and 25mA Full-Scale Versions ♦ Low 0.1µA Shutdown Current ♦ Soft-Start Eliminates Inrush Current ♦ Output Overvoltage Protection ♦ Thermal-Derating Function Protects LEDs ♦ 14-Pin, 3mm x 3mm TDFN Package Applications Ordering Information PINPACKAGE PART MAX8630YETD15+T Display Backlight (Up to 5 LEDs) Main (3 LEDs) + Sub (2 LEDs) Displays 14 TDFN (3mm x 3mm) TOP MARK PKG CODE AAS T1433-2 Note: All devices are specified to operate over the -40°C to +85°C operating temperature range. Cell Phones and Smartphones +Denotes a lead-free package. PDAs, Digital Cameras, and Camcorders Ordering Information continued at end of data sheet. Selector Guide appears at end of data sheet. Pin Configuration LED1 LED2 LED3 LED4 LED5 ENM (CPWM) ENS (PWM) Typical Operating Circuit 14 13 12 11 10 9 8 TOP VIEW 1μF INPUT 2.7V TO 5.5V C1P C1N IN OUT 1μF 1μF GND ENABLE MAIN ON/OFF AND DIMMING OUTPUT MAX8630Z LED1 MAIN MAX8630Y MAX8630Z LED2 ENM LED3 SUB LED4 1μF ( ) ARE FOR MAX8630Y 4 5 6 7 C1P 3 OUT 2 C2P 1 C2N C2N IN C2P C1N LED5 ENS GND ENABLE SUB ON/OFF AND DIMMING TDFN 3mm × 3mm ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX8630Y/MAX8630Z General Description MAX8630Y/MAX8630Z 125mA 1x/1.5x Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN ABSOLUTE MAXIMUM RATINGS IN, OUT to GND.....................................................-0.3V to +6.0V C1N, C2N, ENM, CPWM, ENS, PWM to GND ............................................-0.3V to (VIN + 0.3V) LED_ to GND ............................................-0.3V to (VOUT + 0.3V) C1P, C2P to GND ...-0.3V to greater of (VOUT + 1V) or (VIN + 1V) OUT Short Circuit to GND ..........................................Continuous Continuous Power Dissipation (TA = +70°C) 14-Pin TDFN 3mm x 3mm (derate 18.2mW/°C above +70°C) .............................1454mW Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VIN = 3.6V, VGND = 0V, EN_ (PWM) = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER CONDITIONS MIN IN Operating Voltage Undervoltage-Lockout Threshold No-Load Supply Current Shutdown Supply Current 2.20 VOUT rising, any LED_ = GND Full-Scale LED Current Accuracy 5.5 V 2.45 2.65 V mV 5 V 1.4 1/32nd setting, 1x mode 0.35 ENM = ENS (PWM) = GND TA = +25°C 0.01 TA = +85°C 0.1 mA 2 2 MAX8630_ETD15 15 MAX8630_ETD18 18 MAX8630_ETD20 20 MAX8630_ETD25 25 TA = +25°C TA = -40°C to derating function start temperature Derating Function Start Temperature UNITS 100 1/32nd setting, 1.5x mode Soft-Start Time (tSOFT-START) Full-Scale LED Current MAX 2.7 VIN rising or falling Undervoltage-Lockout Hysteresis Output Overvoltage Protection Threshold TYP µA ms mA -1 ±0.3 +1 -3.5 ±0.3 +3.5 40 % °C Derating Function Slope TA = +40°C to +85°C LED_ Dropout Voltage 100% LED setting (Note 2) 40 1x to 1.5x Mode Transition Threshold VLED_ falling 88 mV 70 mV 122 mV 5 kΩ Input Voltage Mode Transition Hysteresis 1.5x Mode Regulation Voltage Minimum of VLED_ OUT Pulldown Resistance in Shutdown ENM = ENS (PWM) = GND 2 -1.67 _______________________________________________________________________________________ %/°C 75 mV 125mA 1x/1.5x Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN (VIN = 3.6V, VGND = 0V, EN_ (PWM) = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER CONDITIONS Open-Loop OUT Resistance TYP MAX 1x mode, (VIN - VOUT) / IOUT 0.8 1.5 1.5x mode, (1.5VIN - VOUT) / IOUT 3.2 7.2 Maximum OUT Current VIN ≥ 3.2V, VOUT = 3.9V OUT Short-Circuit Current Limit VOUT < 1.25V MIN Ω 125 mA 57 mA 1 MHz 10 Hz Switching Frequency Direct-PWM Dimming Filter Corner Frequency (MAX8630Y) UNITS CCPWM = 0.1µF, (PWM frequency of 900Hz to 200kHz recommended) EN_ (PWM) High Voltage VIN = 2.7V to 5.5V EN_ (PWM) Low Voltage VIN = 2.7V to 5.5V 1.4 EN_ (PWM) Minimum Input Slew Rate VIN = 2.7V to 5.5V (recommended minimum slew rate) EN_ (PWM) Input Current VEN_ (PWM) = 0V or 5.5V V 0.4 V 1 TA = +25°C 0.01 TA = +85°C 0.1 EN_ (PWM) Low Shutdown Delay (tSHDN) V/µs 1 µA 4 ms EN_ tLO (See Figure 4) 0.5 EN_ tHI (See Figure 4) 0.5 µs 50 µs Initial EN_ tHI (See Figure 4) First EN_ (PWM) high pulse 500.0 Thermal Shutdown µs +160 °C 20 °C Thermal-Shutdown Hysteresis Note 1: Limits are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design. Note 2: Dropout voltage is defined as the LED_ to GND voltage at which current into LED_ drops 10% from the value at VLED_ = 0.2V. Typical Operating Characteristics (VIN = 3.6V, ENM = ENS = IN, TA = +25°C, unless otherwise noted.) INPUT CURRENT vs. INPUT VOLTAGE DRIVING 5 LEDs 70 60 ILED = 20mA ILED = 1.875mA 40 ILED = 8.125mA 30 ILED = 20mA 120 100 ILED = 8.125mA 80 60 ILED = 1.875mA 40 20 MAX8630Y/Z toc03 140 160 VIN FALLING 140 INPUT CURRENT (mA) EFFICIENCY (%) 80 VIN FALLING INPUT CURRENT (mA) 90 50 160 MAX8630Y/Z toc01 100 INPUT CURRENT vs. INPUT VOLTAGE DRIVING 3 MAIN LEDs MAX8630Y/Z toc02 EFFICIENCY vs. INPUT VOLTAGE DRIVING 5 LEDs 120 ILED = 20mA 100 80 ILED = 8.125mA 60 40 ILED = 1.875mA 20 10 20 VIN FALLING 0 0 2.7 3.0 3.3 3.6 INPUT VOLTAGE (V) 3.9 4.2 0 2.7 3.0 3.3 3.6 INPUT VOLTAGE (V) 3.9 4.2 2.7 3.0 3.3 3.6 3.9 4.2 INPUT VOLTAGE (V) _______________________________________________________________________________________ 3 MAX8630Y/MAX8630Z ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (continued) (VIN = 3.6V, ENM = ENS = IN, TA = +25°C, unless otherwise noted.) INPUT RIPPLE VOLTAGE vs. SUPPLY VOLTAGE DRIVING 5 WHITE LEDs 100 ILED = 20mA 80 60 ILED = 8.125mA 40 15mA/LED 80 8mA/LED 60 40 27 26 2mA/LED 2.7 3.0 3.3 3.6 20 3.2 2.7 4.2 3.9 3.7 2.7 4.2 LED CURRENT MATCHING vs. INPUT VOLTAGE (2.5mA/LED) 3.5 3.9 4.3 4.7 INPUT VOLTAGE (V) OUTPUT CURRENT vs. TEMPERATURE (5 LEDs AT 25mA EACH) 2.70 2.60 2.50 2.40 2.30 2.20 140 120 OUTPUT CURRENT (mA) MAX8630Y/Z toc07 2.80 100 80 TEMPERATURE DERATING 60 40 20 2.10 2.00 0 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 -40 -15 10 35 60 INPUT VOLTAGE (V) TEMPERATURE (°C) 1x MODE OPERATING WAVEFORMS (VIN = 4.0V) 1.5x MODE OPERATING WAVEFORMS (VIN = 3.6V) MAX8630Y/Z toc09 85 MAX8630Y/Z toc10 VOUT 200mV/div (AC-COUPLED) VOUT 200mV/div (AC-COUPLED) VIN 200mV/div (AC-COUPLED) VIN 200mV/div (AC-COUPLED) IIN 100mA/div IIN 100mA/div 1μs/div 4 3.1 INPUT VOLTAGE (V) INPUT VOLTAGE (V) LED CURRENT (mA) 23 21 0 0 24 22 20 ILED = 1.875mA 25 MAX8630Y/Z toc08 20 120 100 28 MAX8630Y/Z toc06 120 20mA/LED LED CURRENT (mA) 140 140 LED CURRENT MATCHING vs. INPUT VOLTAGE (25mA/LED) MAX8630Y/Z toc05 VIN FALLING INPUT RIPPLE VOLTAGE (mVP-P) 160 MAX8630Y/Z toc04 INPUT CURRENT vs. INPUT VOLTAGE DRIVING 2 SUB LEDs INPUT CURRENT (mA) MAX8630Y/MAX8630Z 125mA 1x/1.5x Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN 1μs/div _______________________________________________________________________________________ 5.1 5.5 125mA 1x/1.5x Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN MAIN STARTUP AND SHUTDOWN WITH SUB ENABLED STARTUP AND SHUTDOWN MAX8630Y/Z toc12 MAX8630Y/Z toc11 5V/div VENM AND VENS 5V/div VENM 2V/div 2V/div VOUT VOUT 0 0 100mA/div 100mA/div IIN IIN 0 0 100mA/div IOUT 100mA/div IOUT 0 0 1ms/div 1ms/div STARTUP AND DIMMING LINE-TRANSIENT RESPONSE WITH MODE CHANGE (VIN = 3.8V TO 3.2V TO 3.8V) MAX8630Y/Z toc13 MAX8630Y/Z toc14 5V/div VENM AND VENS VIN 1V/div 1V/div 500mV/div 3V VOUT VOUT IOUT 20mA/div 50mA/div IOUT 0 20ms/div 200μs/div Pin Description PIN NAME FUNCTION MAX8630Z MAX8630Y 1 1 GND Ground. Connect GND to system ground and the input bypass capacitor as close to the IC as possible. Connect GND to the exposed pad directly under the IC. 2 2 C1N Transfer Capacitor 1 Negative Connection. Connect a 1µF ceramic capacitor from C1P to C1N. 3 3 IN Supply Voltage Input. Connect a 1µF ceramic capacitor from IN to GND. The input voltage range is 2.7V to 5.5V. 4 4 C2N Transfer Capacitor 2 Negative Connection. Connect a 1µF ceramic capacitor from C2P to C2N. _______________________________________________________________________________________ 5 MAX8630Y/MAX8630Z Typical Operating Characteristics (continued) (VIN = 3.6V, ENM = ENS = IN, TA = +25°C, unless otherwise noted.) 125mA 1x/1.5x Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN MAX8630Y/MAX8630Z Pin Description (continued) PIN FUNCTION MAX8630Y 5 5 C2P Transfer Capacitor 2 Positive Connection. Connect a 1µF ceramic capacitor from C2P to C2N. 6 6 C1P Transfer Capacitor 1 Positive Connection. Connect a 1µF ceramic capacitor from C1P to C1N. 7 7 OUT Output. Connect a 1µF ceramic capacitor from OUT to GND. Connect OUT to the anodes of all the LEDs. In shutdown, OUT is pulled down by an internal 5kΩ resistor. ENS Enable and Dimming Control for Sub LEDs (LED4 and LED5). Drive ENS logiclow for greater than 4ms to disable the sub LEDs. Drive both ENM and ENS logic-low for greater than 4ms to shut down the IC. Drive ENS logic-high to begin soft-start and enable maximum (100%) sub LED current. Subsequent pulses on ENS cause the sub LED current to decrease in 32 linear steps. Because of the soft-start delay, it is possible to turn on the IC and quickly set a dim level so the sub LED current never transitions through the maximum setting. See the ENM/ENS Dimming Control section. 8 6 NAME MAX8630Z — 9 — ENM Enable and Dimming Control for Main LEDs (LED1, LED2, and LED3). Drive ENM logic-low for greater than 4ms to disable the main LEDs. Drive both ENM and ENS logic-low for greater than 4ms to shut down the IC. Drive ENM logichigh to begin soft-start and enable maximum (100%) main LED current. Subsequent pulses on ENM cause the main LED current to decrease in 32 linear steps. Because of the soft-start delay, it is possible to turn on the IC and quickly set a dim level so the main LED current never transitions through the maximum setting. See the ENM/ENS Dimming Control section. — 8 PWM Direct PWM input. PWM controls output current as a percentage of full-scale current in proportion to PWM signal duty cycle. The frequency range is 900Hz to 200kHz. — 9 CPWM PWM Filter Capacitor Connection. Connect a capacitor from CPWM to GND to form a filter with the internal 150kΩ resistor. The recommended capacitor for 10Hz corner is 0.1µF. 10 10 LED5 11 11 LED4 12 12 LED3 13 13 LED2 14 14 LED1 — — EP Sub LED Cathode Connections and Charge-Pump Feedback. Current flowing into LED_ is based on the ENS (or PWM) description above. The charge pump regulates the lowest LED_ voltage to 0.12V. Connect LED_ to OUT if the corresponding LED is not populated. Main LED Cathode Connections and Charge-Pump Feedback. Current flowing into LED_ is based on the ENM (or PWM) description above. The charge pump regulates the lowest LED_ voltage to 0.12V. Connect LED_ to OUT if the corresponding LED is not populated. Exposed Paddle. Connect to GND directly under the IC. _______________________________________________________________________________________ 125mA 1x/1.5x Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN C1P 2.7V TO 5.5V C1N 1μF 1μF MAX8630Z C1P 2.7V TO 5.5V OUT IN GND ENM OUT 1μF 1μF GND MAIN LED1 C1N IN LED2 ENABLE MAIN ON/OFF AND SERIAL DIMMING MAX8630Y LED3 LED3 LED4 LED4 DIRECT PWM SIGNAL LED5 ENS C2P C2N LED5 PWM C2P C2N 1μF 1μF Figure 1. Typical Applications Circuit with the MAX8630Z C1P INPUT 2.7V TO 5.5V LED1 LED2 CPWM 0.1μF SUB ENABLE SUB ON/OFF AND SERIAL DIMMING MAX8630Y/MAX8630Z 1μF 1μF IN C1 1μF C2 1μF C1N C2P Figure 2. Typical Applications Circuit with the MAX8630Y C2N OUT 1x/1.5x REGULATING CHARGE PUMP COUT 1μF CIN 1μF GND MAX8630Y MAX8630Z ERROR AMP 1 OVD 1.25V ENS (PWM) CONTROL AND REFERENCE 0.12V ENM (CPWM) MIN SELECT SUB CONTROL MAIN CONTROL 0.6V MAX8630Y ONLY LED1 D1 LED2 D2 LED3 D3 LED4 D4 LED5 D5 ERROR AMP 2 0.6V + + + + + – – – – – RSET ( ) ARE FOR MAX8630Y Figure 3. Functional Diagram _______________________________________________________________________________________ 7 MAX8630Y/MAX8630Z 125mA 1x/1.5x Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN Detailed Description The MAX8630_ charge pump drives up to 5 white LEDs (3 main LEDs and 2 sub LEDs) with regulated constant current for uniform intensity. By utilizing adaptive 1x/1.5x charge-pump modes and very low-dropout current regulators, it achieves 125mA guaranteed output-drive capability and high efficiency over the 1-cell Li+ battery input voltage range. 1MHz fixed-frequency switching allows for tiny external components and the regulation scheme is optimized to ensure low EMI and low input ripple. The MAX8630Z provides independent on/off/dimming control for main and sub displays (see Figure 1). The MAX8630Y allows direct-PWM dimming of all five LEDs together (see Figure 2). A functional diagram for the MAX8630Z/MAX8630Y is shown in Figure 3. 1x to 1.5x Switchover When VIN is higher than VOUT, the MAX8630_ operates in 1x mode and VOUT is pulled up to VIN. The internal current regulators regulate the LED current. As V IN drops, VLEDMIN_ eventually falls below the switchover threshold of 88mV, and the MAX8630_ starts switching in 1.5x mode, and VLEDMIN is regulated to 122mV by the charge pump. To switch back to 1x mode, the MAX8630_ determines if VIN - VOUT is sufficient to keep V LEDMIN greater than 88mV. The comparator that makes this judgment is adaptive and matches the switchover for the conditions. Soft-Start The MAX8630_ includes soft-start circuitry to eliminate inrush current at turn-on. When starting up, the output capacitor is charged directly from the input with a ramped current source (with no charge-pump action) until the output voltage approaches the input voltage. Once this occurs, the charge pump enters 1x mode, 1 0 2 3 4 and the LED output current is then ramped up in 32 linear steps. If the current regulators are in dropout at the end of this time, the charge pump switches to 1.5x mode and the current regulators are ramped again. If the output is shorted to ground (VOUT < 1.25V), the part stays in the initial soft-start stage and output current is limited by the ramped current source. Additionally, when the main or sub LED current rolls over from 1/32 to full, the LED current regulators soft-start again to eliminate input current spikes. ENM/ENS Dimming Control (MAX8630Z) When the LEDs are enabled (by driving EN_ high), the MAX8630Z goes through soft-start and brings the LED current up in 32 linear steps. Dim the MAX8630Z by pulsing EN_ low (500ns to 500µs pulse width). Each pulse reduces the LED current by 1/32nd. After 31 pulses, the current reaches 1/32, and the next pulse restores the current to 100%. Figure 4 shows a timing diagram for EN_. If dimming control is not required, ENM and ENS work as simple on/off controls. Drive ENM/ENS high to enable the LEDs, or drive ENM/ENS low for shutdown. The LEDs operate at 100% brightness under these simple on/off conditions. PWM Dimming Control (MAX8630Y) Dim the MAX8630Y by applying a direct-PWM logiclevel signal to PWM. An internal resistor combined with the capacitor at CPWM forms a lowpass filter that converts the PWM signal to DC LED current that is proportional to the PWM signal’s duty cycle. All five LEDS are controlled together on the MAX8630Y. The PWM frequency range is 900Hz to 200kHz. If dimming control is not required, PWM works as a simple on/off control. Drive PWM high to enable the LEDs, or drive PWM low for shutdown. 5 27 28 29 30 31 32 INITIAL tHI > 50μs EN_ tSOFT-START FULL tHI >500ns tLO 31/32 30/32 500ns TO 500μs 29/32 28/32 27/32 ILED_ 6/32 SHUTDOWN 5/32 FULL 4/32 3/32 2/32 31/32 1/32 Figure 4. MAX8630Z EN_ Timing Diagram 8 _______________________________________________________________________________________ tSHDN 4ms SHUTDOWN 125mA 1x/1.5x Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN Overvoltage Protection If any LED fails as an open circuit, the corresponding VLED_ goes to 0V, and the output voltage is limited to about 5V by gating on/off the charge pump. In case any LED_ is floating or grounded, the MAX8630_ operates in the same overvoltage protection mode. To avoid overvoltage protection mode when using fewer than five LEDs, connect any unused LED_ to OUT. The MAX8630_ contains special circuitry to detect this condition and disables the corresponding current regulator to avoid wasting battery current. Thermal Shutdown The MAX8630_ includes a thermal-protection circuit that shuts down the IC when the die temperature reaches about +160°C. The part turns on after the IC cools by approximately 20°C. Temperature Derating Function The MAX8630 contains a derating function that automatically limits the LED current at high temperatures in accordance with the recommended derating curve of popular white LEDs. The derating function enables the safe usage of higher LED currents at room temperature, thus reducing the number of LEDs required to backlight the display. The derating circuit protects the LEDs from overheating at high PC board temperatures. The derating circuit limits the LED current by reducing the internal 600mV reference voltage above +40°C at approximately -1.67%/°C. The typical derating function characteristic is shown in the Typical Operating Characteristics. Applications Information Driving Fewer than 5 LEDs To avoid overvoltage protection mode when using fewer than five LEDs, connect any unused LED_ to OUT. The MAX8630_ contains special circuitry to detect this condition and disables the corresponding current regulator to avoid wasting battery current. Input Ripple For LED drivers, input ripple is more important than output ripple. Input ripple depends on the source supply’s output impedance. Adding a lowpass filter to the input of the MAX8630_ further reduces input ripple. Alternatively, increasing CIN to 2.2µF (or 4.7µF) cuts input ripple in half (or in fourth) with only a small increase in footprint. The 1x mode always has very low input ripple. Component Selection Ceramic capacitors are recommended due to their small size, low cost, and low ESR. Select ceramic capacitors that maintain their capacitance over temperature and DC bias. Capacitors with X5R or X7R temperature characteristics generally perform well. See Table 1 for a list of recommended components. Using a larger value input capacitor helps to reduce input ripple (see the Input Ripple section). PC Board Layout and Routing The MAX8630_ is a high-frequency, switched-capacitor voltage regulator. For best circuit performance, use a solid ground plane and place CIN, COUT, C1, and C2 as close to the MAX8630_ as possible. See the MAX8630Z evaluation kit for an example layout. Chip Information PROCESS: BiCMOS Table 1. Recommended Components DESIGNATION VALUE CIN, COUT, C1, C2 1µF D1–D5 — MANUFACTURER PART NUMBER Taiyo Yuden JMK105 BJ105MV TDK C1005X5R0J105M Nichia NSCW215T DESCRIPTION 1µF ±20%, 6.3V X5R ceramic capacitors (0402) 1µF ±20%, 6.3V X5R ceramic capacitors (0402) White LEDs _______________________________________________________________________________________ 9 MAX8630Y/MAX8630Z Shutdown Mode When both ENM and ENS (or PWM) are held low for 4ms or longer, the MAX8630_ is shut down and put in a low-current mode. OUT is internally pulled to GND with 5kΩ during shutdown. MAX8630Y/MAX8630Z 125mA 1x/1.5x Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN Ordering Information (continued) TOP MARK PKG CODE 14 TDFN (3mm x 3mm) AAS T1433-2 14 TDFN (3mm x 3mm) AAT MAX8630YETD18-T 14 TDFN (3mm x 3mm) AAT T1433-2 MAX8630YETD20+T 14 TDFN (3mm x 3mm) AAU T1433-2 MAX8630YETD20-T 14 TDFN (3mm x 3mm) AAU T1433-2 MAX8630YETD25+T 14 TDFN (3mm x 3mm) AAV T1433-2 MAX8630YETD25-T 14 TDFN (3mm x 3mm) AAV T1433-2 MAX8630ZETD15+T 14 TDFN (3mm x 3mm) AAW T1433-2 MAX8630ZETD15-T 14 TDFN (3mm x 3mm) AAW T1433-2 MAX8630ZETD18+T 14 TDFN (3mm x 3mm) AAX T1433-2 MAX8630ZETD18-T 14 TDFN (3mm x 3mm) AAX T1433-2 MAX8630ZETD20+T 14 TDFN (3mm x 3mm) AAY T1433-2 MAX8630ZETD20-T 14 TDFN (3mm x 3mm) AAY T1433-2 MAX8630ZETD25+T 14 TDFN (3mm x 3mm) AAZ T1433-2 MAX8630ZETD25-T 14 TDFN (3mm x 3mm) AAZ T1433-2 PART MAX8630YETD15-T MAX8630YETD18+T PINPACKAGE T1433-2 Selector Guide FULL-SCALE CURRENT (mA) DIMMING INTERFACE MAX8630YETD15 15 Direct PWM MAX8630YETD18 18 Direct PWM MAX8630YETD20 20 Direct PWM MAX8630YETD25 25 Direct PWM MAX8630ZETD15 15 Serial Pulse MAX8630ZETD18 18 Serial Pulse MAX8630ZETD20 20 Serial Pulse MAX8630ZETD25 25 Serial Pulse PART Note: All devices are specified to operate over the -40°C to +85°C operating temperature range. +Denotes a lead-free package. 10 ______________________________________________________________________________________ 125mA 1x/1.5x Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN 6, 8, &10L, DFN THIN.EPS ______________________________________________________________________________________ 11 MAX8630Y/MAX8630Z Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) MAX8630Y/MAX8630Z 125mA 1x/1.5x Charge Pumps for 5 White LEDs in 3mm x 3mm TDFN Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) COMMON DIMENSIONS PACKAGE VARIATIONS SYMBOL MIN. MAX. PKG. CODE N D2 E2 e JEDEC SPEC b [(N/2)-1] x e A 0.70 0.80 T633-2 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF D 2.90 3.10 T833-2 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF E 2.90 3.10 T833-3 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF A1 0.00 0.05 T1033-1 10 1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 2.00 REF L 0.20 0.40 T1033-2 10 1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 2.00 REF k 0.25 MIN. T1433-1 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.05 2.40 REF A2 0.20 REF. T1433-2 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.05 2.40 REF Revision History Pages changed at Rev 1: 1, 3, 6, 8–12 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
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