G5122 Global Mixed-mode Technology Inc. Micro-power Inverting DC/DC Converters in SOT-23-5 Features General Description The G5122 inverting DC/DC converter is designed for small/ medium size LCD panel of high bias voltage. Configurable Output Voltage Up to -30V 20µA Quiescent Current <1µA Shutdown Current <1µA Shutdown Pin Current Supply Range from 2.5V to 6.5V Low RDS(ON): 0.8Ω Tiny SOT23-5 Package Due to a typical 20µA quiescent current and 2.5V~ 6.5V supply voltage range, it is suitable for battery powered portable applications. Such as PDAs and Handheld Computers. When the IC sets to shutdown mode, it only consumes less than 1µA. Applications Furthermore, the 350mA current limit, 500ns fixed minimum off-time and tiny SOT23-5 package facilitates the use of smaller inductor and other surface-mount components to minimize the PCB size in those space-conscious applications. STN/TFT LCD Bias Personal Digital Assistants (PDAs) Handheld Computers Digital Still Cameras Cellular Phones Web Pad To control the IC, no other external current is needed for the shutdown pin. It typically consumes less than 1µA of full supply range. Ordering Information ORDER NUMBER ORDER NUMBER (Pb free) MARKING TEMP. RANGE PACKAGE G5122T11U G5122T11Uf 5122x -40°C ~ +85°C SOT-23-5 Pin Configuration Typical Application Circuit VIN 2.5V to 4.2V SW 1 5 SW 316k 4.7µF GND 2 G5122 * 47PF 10µF G5122 G963 4 FBN 3 10µH -28V VCC VCC 0.1µF 10µH SHDN SHDN FB GND 15k SOT23-5 * option TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.2 Preliminary Mar 21, 2005 1 G5122 Global Mixed-mode Technology Inc. Absolute Maximum Ratings SW to GND…………………………………..-0.3V to +33V FBN to GND…………… …………………… -VCC to +0.3V VCC, SHDN to GND.............................….....-0.3V to +7V Operating Temperature Range (Note 1) ..-40°C to +85°C Junction Temperature ......….......….........….........+125°C Storage Temperature…………........….. –65°C to +150°C Reflow Temperature (Soldering, 10 sec).….………260°C Stress beyond those listed under “Absolute Maximum Rating” may cause permanent damage to the device. Electrical Characteristics (VCC = 3.6V, V SHDN = 3.6V, TA = 25°C) PARAMETER CONDITIONS MIN TYP MAX UNITS 2.5 ----- --20 0.1 6.5 35 1 V µA µA -1.18 -1.2 -1.22 V --------- -0.05 -1.6 500 0.8 ---2.4 --1 %/V µA ns Ω Switch Current Limit 300 350 400 mA SHDN Pin Current --- 0.1 1 µA SHDN Input Voltage High 0.9 --- --- V SHDN Input Voltage Low --- --- 0.25 V --- 0.01 5 µA --- 1.9 --- V Input Voltage Range Not Switching V SHDN = 0V Quiescent Current FBN Comparator Trip Point Output Voltage Line Regulation FBN Pin Bias Current (Note 2) Switch Off Time Switch RDS(ON) Switch Leakage Current 2.5V<VIN<6.5V VFBN = -1.2V VFBN < -1V ISW = 150mA Switch Off, VSW = 33V Input Voltage UVLO Note 1: The G5122 are guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the -40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Note 2: Bias current flows into the FBN pin. Block Diagram L1 C3 L2 D2 VIN VOUT C1 BIAS VOUT R1 SHUTDOWN LOGIC -1.2V C2 UVLO en_sw + R2 D1 PUMP CONTROL OC DRIVER COMP ERROR COMP FB SW SHDN VCC + TOFF PULSE CONTROL VREF GND TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.2 Preliminary Mar 21, 2005 2 G5122 Global Mixed-mode Technology Inc. Typical Performance Characteristics (VCC=+3.6V, V SHDN =+3.6V, L=10µH, TA=25°C, unless otherwise noted.) Line Transient Load Transient Output Voltage vs. Input Voltage Output Voltage vs. Load Current -27 -27 VOUT=-28.5V -27.5 Output Voltage (V) Output Voltage (V) IOUT=10mA -28 -28.5 -27.5 -28 -28.5 -29 -29 2 2.5 3 3.5 4 4.5 Input Voltage (V) 5 5.5 6 1 2 4 5 6 7 8 9 10 Load Current (mA) Quiescent Current vs. Temperature Vds_on vs. Temperature 250 25 VCC=4.2V 200 Switch Vds_on (mV) 20 Quiescent Current (µA) 3 15 VCC=2.7V VCC=3.6V 10 5 VCC=2.7V 150 100 VCC=4.2V 50 0 VCC=3.6V 0 -40 -20 0 20 40 60 Temperature (°C) 80 100 -40 -20 0 20 40 60 Temperature (°C) 80 100 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.2 Preliminary Mar 21, 2005 3 G5122 Global Mixed-mode Technology Inc. Typical Performance Characteristics (Continued) Feedback Bias Current vs. Temperature Feedback Voltage vs. Temperature 3 Feedback Bias Current (nA) Feedback Voltage (V) -1.18 -1.19 -1.2 -1.21 -1.22 2.5 2 1.5 1 0.5 0 -40 -20 0 20 40 60 Temperature (°C) 80 100 -40 Crrent Limit vs. Temperature -20 0 20 40 60 Temperature (°C) 80 100 Efficiency vs. Load Current 450 100 90 Efficiency (%) Peak Crrent (mA) VCC=4.2V 350 300 VCC=4.2V 80 400 60 50 VCC=3.6V 40 VCC=2.7V 30 VCC=3.6V VCC=2.7V 70 20 10 250 0 -40 -20 0 20 40 60 Temperature (°C) 80 100 0.1 1 10 Load Current (mA) 100 Recommended Minimum Footprint SOT-23-5 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.2 Preliminary Mar 21, 2005 4 Global Mixed-mode Technology Inc. G5122 Pin Description PIN NAME FUNCTION 1 2 SW GND 3 FBN 4 SHDN 5 VCC Switch Pin. The drain of the internal NMOS power switch. Connect this pin to inductor. Ground. Feedback Pin. Set the output voltage by selecting values for R1 and R2 (see Block Diagram): |VOUT| - 1.2 R1 = 1.2/R2 + (1.6x10-6) Active-Low Shutdown Pin. Tie this pin to logic-high to enable the device or tied it to logic-low to turn this device off. Input Supply Pin. Bypass this pin with a capacitor as close to the device as possible. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.2 Preliminary Mar 21, 2005 5 G5122 Global Mixed-mode Technology Inc. Package Information C D L E H θ1 e1 e A A2 A1 b Note: 1. Package body sizes exclude mold flash protrusions or gate burrs 2. Tolerance ±0.1000 mm (4mil) unless otherwise specified 3. Coplanarity: 0.1000mm 4. Dimension L is measured in gage plane DIMENSIONS IN MILLIMETERS SYMBOLS MIN NOM MAX A 1.00 1.10 1.30 A1 A2 0.00 0.70 ----0.80 0.10 0.90 b C 0.35 0.10 0.40 0.15 0.50 0.25 D E e e1 2.70 1.40 --------- 2.90 1.60 1.90(TYP) 0.95 3.10 1.80 --------- H L θ1 2.60 0.37 2.80 ------ 3.00 ----- 1º 5º 9º Taping Specification PACKAGE Q’TY/REEL SOT-23-5 3,000 ea Feed Direction SOT-23-5 Package Orientation GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.2 Preliminary Mar 21, 2005 5