Series PFM (Frequency)Controlled, Step-Up DC/DC Converters ◆Pager Use : Low Noise ■Applications ◆Duty Ratio : 75% ●Pagers ◆CMOS Structure : Small Supply ●Palmtops ●Cameras, Video cameras Current ◆Operating Voltage Range : 0.9~10.0V ◆Output Voltage Range ●Various portable products : 2.0~7.0V 4 ◆Output Voltage Accuracy : ±2.5% ■General Description ■Features The XC6385 series are a group of PFM (frequency) controlled step-up DC/DC converters. The XC6385 series employs CMOS process and laser trimming technologies to attain low power and high accuracy. A common problem among pagers is one of noise, but with the XC6385, high frequency noise that occurs during switching is reduced. Output voltage is selectable in 0.1V steps within 2.0V ~ 7.0V and maximum frequency is 100kHz (Typ.) With a built-in switching transistor, a step-up circuit can be configured using a coil, diode and capacitor connected externally. Low noise Operating voltage range : 0.9V~10V Output voltage range : 2.0V~7.0V (programmable in 0.1V steps) Output voltage accuracy: ±2.5% Maximum oscillator frequency : 100kHz (±15%) Built-in switching transistor CE function and/or separated VDD/VOUT types selectable with Also available is a CE (chip enable) function that reduces power consumption during shut-down mode, and an independent V DD pin 5 pin packages Small package : SOT-23/25 mini-mold (3pin, 5pin) SOT-89/89-5 mini-power mold (3 pin, 5 pin) function (separated power supply and voltage detect pins) for fly-back circuits. SOT-89-5 and SOT-23/25 small packages. ■Typical Application Circuit ■Electrical Characteristics For typical application circuit and electrical characteristics of XC6385 series, please refer to that of XC6382 series. For more detail, please contact Torex sales offices or sales person. ■Pin Configuration ■ 端子配列 XC6385C/E XC6385A XC6385C/E XC6385A VOUT LX VSS 3 5 4 SOT-23 (TOP VIEW) 1 2 VSS LX 1 2 3 LX 5 4 SOT-89 (TOP VIEW) SOT-25 (TOP VIEW) CE/VOUT VOUT/VDD NC VSS SOT-89-5 (TOP VIEW) 1 2 3 1 VSS VOUT LX NC 2 3 VOUT/VDD CE/VOUT 525 XC6385 Series ■Product Classification ●Selection Guide PARAT TYPE DUTY RATIO PACKAGE XC6385A 75% SOT-23 SOT-89 Built-in NO NO Duty Ratio 75% XC6385C 75% SOT-23 SOT-89-5 Built-in YES NO Stand-by (CE) function During stand-by (CE pin "Low"), Supply current = 0.50µA (max) XC6385E 75% SOT-23 SOT-89-5 Built-in NO YES Since the power supply (VDD) pin and the voltage sensor (VOUT) pin are separated, use as a PFM controller is possible. SWITCHING CE TRANSISTOR FUNCTION VDD PIN 4 ●Ordering Information XC6385qwerty XC6385 Series q PFM Controlled Duty 75% A 3-pin. Built-in switching transistor C Stand-by capability. (5-pin) Built-in switching transistor E Stand-by capability. (5-pin) Built-in switching transistor w e r Output Voltage e.g.VOUT=3.5V ➔ w=3, e=5 1 Maximum Oscillator Frequency M Package q=A q=C, E P Package q=A q=C, E R Embossed tape: Standard Feed L Embossed tape: Reverse Feed t y 526 100kHz SOT-23 SOT-25 SOT-89 SOT-89-5 FEATURES XC6385 Series ■Packaging Information ●SOT-23 0.4 +0.1 +0.1 -0.05 0.15 -0.05 +0.2 -0.1 0.2min 1.6 2.8±0.2 0∼0.1 （0.95） 1.1±0.1 1.9±0.2 4 2.9±0.2 ●SOT-25 +0.1 0.15 -0.05 0.4 +0.1 -0.05 +0.2 -0.1 0.2min 1.6 2.8±0.2 0∼0.1 （0.95） 1.9±0.2 1.1±0.1 2.9±0.2 527 XC6385 Series ●SOT-89 1.5±0.1 +0.15 -0.2 0.8 min 4.25max 2.5±0.1 1.6 （0.4） 4.5±0.1 0.42±0.06 0.42±0.06 0.4 0.47±0.06 4 1.5±0.1 1.5±0.1 ●SOT-89-5 +0.15 1.6 -0.2 1.5±0.1 0.8min 4.5max 0.8min 0.42±0.06 2.5±0.1 （0.4） 0.42±0.06 0.42±0.06 0.42±0.06 0.42±0.06 0.47±0.06 1.5±0.1 1.5±0.1 4.5±0.1 528 0.4 +0.03 -0.02 +0.03 -0.02 XC6385 Series ■Marking q w e r qwer SOT-25 (TOP VIEW) SOT-23 (TOP VIEW) w r 2 4 q e 1 3 SOT-89 (TOP VIEW) SOT-89-5 (TOP VIEW) q Represents the Product Classification DESIGNATOR FUNCTION PRODUCT NAME − Built-in Transistor XC6385A＊＊＊＊＊ L CE Built-in Transistor XC6385C＊＊＊＊＊ N VDD/VIN Built-in Transistor XC6385E＊＊＊＊＊ E w Represents the integer of the Output Voltage and Oscillator Frequency INTEGER OF THE OUTPUT VOLTAGE 4 OSCILLATOR FREQUENCY（kHz） 100 1 2 1 3 4 3 4 5 5 6 7 6 7 2 e Represents the decimal number of the Output Voltage and Oscillator Frequency OUTPUT VOLTAGE OSCILLATOR FREQUENCY（kHz） 100 0 0 1 1 2 3 2 3 4 5 6 7 4 5 6 7 8 8 9 9 r Denotes the production lot number 0 to 9, A to Z repeated(G.I.J.O.Q.W excepted) 529 XC6385 Series ■ ブロック図Diagram ■Block VDD Lx VLX limiter Vref VOUT Buffer + PFM Control OSC 100kHz VSS - Chip Enable CE Note: The CE pin is set up for XC6385C. 4 VDD V DD Lx VLX limiter ・ Vref V OUT Buffer VSS ・ PFM Control OSC 100kHz + - Note: The VDD pin is set up for XC6385E. ■Electrical Characteristics For electrical characteristics of XC6385 series, please refer to that of XC6382 series. For more detail, please contact Torex sales offices or sales person. 530 XC6385 Series ■Typical Performance Characteristics ●XC6385A301 (Outut Voltage = 3.0V) (1) OUTPUT vs. OUTPUT CURRENT (2)(2)効率 EFFICIENCY vs. OUTPUT CURRENT (1) 出力電圧VOLTAGE − 出力電流特性例 − 出力電流特性例 XC6385A301 L=220μH,CL=22μF (Tantalum) 100 TOP DOWN VIN=1.8V,1.5V,1.2V 3.1 Efficiency:EFFI (%) Output Voltage:VOUT (V) XC6385A301 L=220μH,CL=22μF (Tantalum) 3.2 TOP DOWN VIN=1.8V,1.5V,1.2V 3.0 0.9V 2.9 2.8 80 60 0.9V 40 20 0 2.7 0 2 4 6 8 0 10 (3) RIPPLE VOLTAGE vs. OUTPUT CURRENT (3) リップル電圧 − 出力電流特性例 8 10 1.5V 1.2V 0.9V 0 vs. INPUT VOLTAGE 4 L=220μH,CL=22μF (Tantalum) 30 Input Current:IIN (µA) Ripple Voltage:Vr (mVp-p) VIN =1.8V 90 30 6 XC6385A301 L=220μH,CL=22μF (Tantalum) 60 4 (4)無負荷入力電流 NO LOAD INPUT CURRENT (4) − 入力電圧特性例 XC6385A301 120 2 Output Current:IOUT (mA) Output Current:IOUT (mA) 20 10 0 0 2 4 6 8 Output Current:IOUT (mA) 10 0.8 1.2 1.6 2.0 2.4 Input Voltage:VIN (V) 531