G5180 Global Mixed-mode Technology Inc. Switching Regulator Power Controller Features General Description 2.2V~6V Supply Voltage Operating Range Low Current Consumption: 5mA in Operation, 1µA or Less in Stand-by 20kHz to 1MHz Operation Frequency Range Built-In Soft Start Circuit Built-In Timer-Latch Type Short Circuit Detection and Protection (SCP) Circuit Use External Resistor to Set a Fixed Output Current The G5180 is a single-channel PWM control IC for low voltage DC/DC conversion incorporating a soft start function and short circuit detection function. The device has a low minimum operating voltage of 2.2V and is ideal for the power supply of battery-operated electronic equipment. Applications Ordering Information LCD Displays PDAs Digital Still Cameras ORDER MARKING NUMBER G5180P1U G5180P8U G5180 G5180 TEMP. RANGE PACKAGE (Pb free) 0°C to 85°C 0°C to 85°C SOP-8 MSOP-8 Note: P1: SOP-8; P8: MSOP-8 U: Tape & Reel Pin Configuration Typical Application Circuit 18kΩ 22µH G5180 VO 5V G5180 INSCP 8 1 7 2 FB OSC INVCC 3V VCC 6 3 GND 33µF 2kΩ BR/CTL 4 5 OUT 0.1µF ON OFF CTL SOP-8 / MSOP-8 FB SCP OSC VCC GND 10µF BR/CTL OUT 390Ω 270pF 0.1µF 3kΩ TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Preliminary Apr 27, 2006 1 G5180 Global Mixed-mode Technology Inc. Absolute Maximum Ratings Operating Temperature, TOP . . . . . . . . . . 0°C to +85°C Storage Temperature Range, TSTG . . .-65°C to+165°C Reflow Temperature (soldering, 10sec) . . . . . . 260°C Power Supply Voltage, VCC. . . . . . . . . . . . . . . . . . . .7V VCC, IN- to GND. . . . . . . . . . . . . . . . . . . .-0.3V to +7V SCP, BR/CTL, OUT, OSC, FB to GND . . . . . . . . . . . . . . . . . . . . . . . .. . . -0.3V to (VCC+0.3V) Electrical Characteristics VCC=2.2V, TA=25°C, unless otherwise noted. PARAMETER Under voltage lockout (UVLO) Soft start Threshold voltage VTH Charging current ICS Voltage at soft start completion Vts Short circuit detection Charging current and protection (SCP) Threshold voltage Sawtooth waveform oscillator (OSC) Oscillation frequency Frequency input Stability Frequency variation with temperature Input threshold voltage adjust- VSCP=0V MIN TYP MAX UNIT 1.3 1.5 1.7 V -1.5 -1 -0.7 µA 0.7 0.8 0.9 V -1.5 0.7 --- -1 0.8 500 -0.7 0.9 --- µA V kHz ICSCP VtSCP VSCP=0V fOSC RT=3.0kΩ, CT=270pF fΔV VCC=2.2V to 6V --- 2 --- % fΔT TA=0°C to 85°C --- 5 --- % VFB=450mV 480 500 520 mV VCC=2.2 to 6V -10 5 10 mV VT variation with temperature Input bias current VTΔT TA=0°C to 85°C VIN-=0V ---1 1 0 --1 % µA Voltage gain Frequency bandwidth AV BW 100 --- 140 6 180 --- V/V MHz IB Av=0dB VOMax+ 0.78 2 --- V Output source current VOMaxIOMax+ ----- 0.05 -60 0.2 -24 V µA Output sink current IOMax- 24 700 --- µA Maximum duty cycle TDUTY 75 85 95 % 1 0.8 ----- 1.2 1 0.1 0.1 ----0.2 0.2 V V V V --30 -30 60 -20 --- mA mA kΩ Maximum output voltage range Idle period ment section CONDITION VT VTΔV VT input stability Error amplifier SYMBOL Output voltage VOH1 VOH2 VFB=450mV RT=3.0kΩ, CT=270pF, VFB=0.8V RB=390Ω, IO=-15mA RB=750Ω, VCC=2.2V, IO=-10mA Output source current Output sink current VOL2 IO + IO- RB=390Ω, IO=15mA RB=750Ω, VCC=2.2V,IO=10mA RB=390Ω, VO=0.9V RB=390Ω, VO=0.3V Pull down resistance Pin voltage RO VBR RB=390Ω 20 0.2 30 0.3 50 0.4 BR/CTL pin open or VCC RB=390Ω -3 ---1.8 -1 --- --------2 0 -40 -0.1 1 5 Output section Output current Setting Input off condition /Control Section Input on condition Pin current range Stand-by current Entire device Average supply current VOL1 IOFF ION IBR ICCS ICC V µA µA mA µA mA TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Preliminary Apr 27, 2006 2 G5180 Global Mixed-mode Technology Inc. Typical Performance Characteristics VCC= 2V, RBR=390Ω, RT=3kΩ, CT=270pF, TA= 25°C, unless otherwise noted. Supply Current ICC vs. Supply Voltage VCC Input Threshold Voltage VT vs. Supply Voltage VCC 550 5.0 4.5 Supply Current ICC (mA) Input Threshold Voltage VT (mV) RBR = 390Ω 4.0 3.5 3.0 TA = +85°C 2.5 2.0 1.5 1.0 TA = -45°C TA = +25°C 530 TA = +85°C TA = +55°C 510 490 TA = +25°C TA = -45°C 470 0.5 450 1.5 2.0 4.0 4.5 5.0 5.5 6.0 6.5 Supply Voltage V CC (V) Input Threshold Voltage Variation Ratio Δ V T/VT vs. Supply Voltage VCC Input Threshold Voltage Variation Ratio ΔVT/V T vs. Ambient Temperature TA 10 10 8 8 6 4 TA = +85°C 2 0 -2 TA = -45°C -4 TA = +25°C -6 -8 V CC = 2.2V 6 4 2 0 -2 -4 -6 -8 -10 1.5 -10 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Supply Voltage V CC (V) 5.5 6.0 -45 -35 -25 -15 6.5 -5 5 15 25 35 45 55 65 75 85 95 105 115 125 Ambient Temperature TA ( °C) Low Level Output Voltage VOL vs. Output Sink Current IO- High Level Output Voltage VOH vs. Output Source Current IO+ 900 2.8 V CC = 2.2V RBR = 390Ω TA = + 25°C 2.4 2.0 Low Level Output Voltage VOL (mV) High Level Output Voltage VOH (V) 2.5 3.0 3.5 Supplyt Voltage V CC (V) Input Threshold Voltage Variation Ratio ΔVT/VT (%) Input Threshold Voltage Variation Ratio ΔVT/VT (%) 0.0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 1.6 1.2 0.8 0.4 0.0 V CC = 2.2V RBR = 390Ω TA = + 25°C 750 600 450 300 150 0 0 -10 -20 -30 -40 0 -50 20 40 60 80 100 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Preliminary Apr 27, 2006 3 G5180 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) Output Source Current I O+ vs. BR/CTL Pin Current I BR BR/CTL Pin Voltage VBR vs. BR/CTL Pin Current IBR 800 -120 V CC=2.2V TA = +25°C 700 BR/CTL Pin Voltage V BR (mV) Output Source Current IO+ (mA) -100 -80 -60 -40 -20 TA = +25°C 600 500 V CC = 6V 400 300 200 V CC = 2.2V 100 0 0.0 0 0.0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 -1.4 -1.6 -1.8 -2.0 0.4 Oscillation Freuency fosc vs. Timing Resistor RT 1.6 2.0 2.4 100 TA = + 25°C CT = 100pF CT = 270pF 95 1000 Maximum Duty Cycle (%) Oscillation Frequency fosc (kHz) 1.2 Oscillation Frequency fosc vs. Maximum Duty Cycle 10000 100 10 CT = 10000pF CT = 3300pF V CC = 2.2V CT = 270pF TA = 25°C 90 85 80 75 70 65 CT = 1000pF 1 60 1 10 10 Timing Resistor RT (kΩ) Frequency variation ratio Δ f/f vs. Supply Voltage VCC 8 RT = 3kΩ CT = 270pF TA = +25°C Frequency Variation Ratio Δf/f (%) 6 TA = -45°C 2 0 TA = +85°C -2 -4 -6 -8 -10 1.5 1000 10 8 4 100 Oscillation Frequency fosc (kHz) Frequency variation ratio Δ f/f vs. Ambient Temperature TA 10 Frequency Variation Ratio Δf/f (%) 0.8 BR/CTL Pin Current IBR (mA) BR/CTL Pin Current IBR (mA) V CC = 2.2V RT = 3K CT = 270 pF 6 4 2 0 -2 -4 -6 -8 -10 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 -45 -35 -25 -15 6.5 -5 5 15 25 35 45 55 65 75 85 95 105 115 125 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Preliminary Apr 27, 2006 4 Global Mixed-mode Technology Inc. G5180 Recommended Minimum Footprint MSOP-8 SOP-8 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Preliminary Apr 27, 2006 5 Global Mixed-mode Technology Inc. G5180 Pin Description PIN NAME I/O 1 2 INSCP I - Error amplifier inverting input Soft start and SCP setting capacitor connection FUNCTION 3 4 VCC BR/CTL I Power supply Output current setting and control 5 6 OUT GND O - Output Ground 7 8 OSC FB O Capacitor and resistor connection pin for setting the oscillation frequency Error amplifier output Block Diagram VCC 3 REFERENCE VOLTAGE OSC 7 SAWTOOTH WAVE OSCILLATOR UVLO 4 BR/CTL 1.25V IN- 1 + 0.5V 5 OUT OUTPUT DRIVER CONTROL + + + + + FB 8 SOFT START SCP 6 GND 2 SCP TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Preliminary Apr 27, 2006 6 G5180 Global Mixed-mode Technology Inc. Description Soft Start SCP At power on, the G5180 enters the soft-start mode to prevent current spike and overshoot. The capacitor CS is charged from 0V with a constant current of 1µA. The cycle (T) can be determined as follows: VX = VH x e The soft-start time for the duty cycle - t / (C xR ) T T t = -CT x RT x ln ( VX VH ) T = −C T × R T × ln(0.1 / 0.8 ) ≈ 2.1 × C T × R T [s] tS = 0.8 x CS (µF) Switching Regulator Function When VSCP reaches 0.8V, the G5180 leaves the soft-start mode to enter the normal mode and enable the SCP function. If the output load conditions change rapidly causing the output to drop suddenly, the external capacitor CS will start to charge because the error amplifier output (FB pin) is fixed at VOMax+. When the external capacitor is charged above 0.8V, the output pin is set low. Once the latch circuit has set, the capacitor CS will be discharged to low state and the latch circuit will not reset until power is turned off or the power supply is restarted. Short-circuit detection time (or full soft-start time): Reference Voltage circuit tPE = 0.8 x CS (µF) PWM Comparator A temperature-compensated reference voltage (~1.25V) is generated by the reference voltage circuit from the voltage supplied by the power supply pin (pin 3). The circuit also sets the idle period besides providing the reference voltage for the switching regulator. Error Amplifier The error amplifier detects the output voltage of the switching regulator and sets the PWM control signal. The voltage gain is fixed. The system is made stable by connecting a phase compensation capacitor to the FB pin (pin 8). The voltage comparator includes one inverting and three non-inverting inputs. The comparator is a voltage to pulse width converter that controls the ON time of the output pulse depending on the level of input voltage. The output level remains high when the sawtooth wave is lower than the error amplifier output voltage, the soft start setting voltage, and the idle period setting voltage. Setting Oscillating Frequency The oscillator circuit generates a triangular sawtooth wave with a peak of 0.8V and a trough of 0.1V using the timing capacitor (CT) and the timing resistor (RT) that are connected to the OSC pin. This oscillator can provide oscillating frequency in the range from 20kHz to 1MHz. The waveform of the OSC pin is shown as Figure 1. Output Circuit The output circuit can drive an external NPN transistor or NMOS directly. The value of the ON/OFF current can be set by a resistor connected to the BR/CTL pin (pin 4). Stand-by mode (supply current 1µA or less) can be set by connecting the BR/CTL pin (pin 4) to VCC or by making the pin open. VOSC VH 0.8V Under-Voltage Lockout (UVLO) Transients during powering on or instantaneous glitches in the supply voltage can cause the control IC to malfunction and damage the system. To prevent malfunction at low input voltage, the circuit compares the supply voltage to the internal reference voltage to detect a low input voltage. Once detected, the circuit sets the output pin low. VX 0.1V VL t Time Figure 1 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Preliminary Apr 27, 2006 7 G5180 Global Mixed-mode Technology Inc. Package Information C H E L D θ 7 ° (4X) A2 y e A A1 B SOP-8 Package Note: 1. Package body sizes exclude mold flash and gate burrs 2. Dimension L is measured in gage plane 3. Tolerance 0.10mm unless otherwise specified 4. Controlling dimension is millimeter converted inch dimensions are not necessarily exact. MIN. DIMENSION IN MM NOM. MAX. MIN. DIMENSION IN INCH NOM. MAX. A 1.35 1.60 1.75 0.053 0.063 0.069 A1 A2 B C 0.10 ----0.33 0.19 ----1.45 --------- 0.25 ----0.51 0.25 0.004 ----0.013 0.007 ----0.057 --------- 0.010 ----0.020 0.010 D E e H L y θ 4.80 3.80 ----5.80 0.40 ----- --------1.27 ------------- 5.00 4.00 ----6.20 1.27 0.10 0.189 0.150 ----0.228 0.016 ----- --------0.050 ------------- 0.197 0.157 ----0.244 0.050 0.004 0° ----- 8° 0° ----- 8° SYMBOL TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Preliminary Apr 27, 2006 8 G5180 Global Mixed-mode Technology Inc. A A 8 C L E E1 1 DETAIL “A” e θ2 A2 SEATING PLANE A A1 b R1 0.25 0.076 C R GAUGE PLANE D WITH PLATING c1 BASE METAL c θ1 θ3 L b1 b SECTION A-A MSOP-8 Package SYMBOL A A1 A2 b b1 c c1 D E1 e E L θ1 θ2 θ3 R R1 JEDEC MIN. DIMENSION IN MM NOM. ----0.05 0.81 0.25 0.25 0.13 0.13 2.90 2.90 0.445 0° 0.09 0.09 --------0.86 ----0.30 ----0.15 3.00 3.00 0.65 BSC 4.90 BSC 0.55 ----12 REF 12 REF --------- MAX. MIN. 1.10 0.15 0.91 0.40 0.35 0.23 0.18 3.10 3.10 ----0.002 0.032 0.008 0.010 0.005 0.005 0.114 0.114 0.648 6° 0.0175 0° --------- 0.004 0.004 DIMENSION IN INCH NOM. --------0.034 ----0.012 0.006 0.118 0.118 0.026 BSC 0.193 BSC 0.0217 ----12 REF 12 REF --------- MAX. 0.043 0.006 0.036 0.012 0.014 0.009 0.007 0.122 0.122 0.0255 6° --------- MO-187AA Taping Specification PACKAGE Q’TY/REEL SOP-8 MSOP-8 2,500 ea 2,500 ea Feed Direction Typical SOP/MSOP 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: 0.4 Preliminary Apr 27, 2006 9