XC9213

XC9213 Series Synchronous Step-Down DC/DC Controller IC - Input Voltage : 25V ETR0505_001 ☆GreenOperation Compatible ■GENERAL DESCRIPTION The XC9213 series is N-ch & N-ch drive, synchronous, step-down DC/DC controller IC with a built-in bootstrap driver circuit. Output will be stable no matter which load capacitors, including low ESR capacitors, are used. Resistance (RSENSE) of about several 10mΩ will be required as a current sense. The phase compensation is also run when a low ESR capacitor is used. In addition, the circuit is double protected by the ways of limiting the current while detecting overshoot current and making output shutdown at any given timing by a protection time setting capacitor (CPRO). The output voltage can be set freely within a range of 1.5V~15.0V with 1.0V (accuracy±2%) of internal reference voltage by using externally connected resistors (RFB1, 2). Synchronous rectification PWM control can be switched to non-synchronous current limit PFM/PWM automatic switchable control (=voltage between RSENSE pins) by using the MODE pin. The series has a built-in voltage detector for monitoring a selected voltage by external resistors. During stand-by (CE pin = low) all circuits are shutdown to reduce current consumption to as low as 4.0μA or less. ■APPLICATIONS ●PDAs ●Mobile phones ●Note book computers ●Portable audio systems ●Various multi-function power supplies ■FEATURES : 4.0V ~ 25.0V : 1.5V ~ 15.0V externally set Reference voltage: 1.0V (±2%) Oscillation Frequency : 300kHz (±15%) Output Current : More than 5A (VIN=5.0V, VOUT=3.3V) Control : PWM/PFM manual-switching control Current Limiter : Current limit operates at voltage Protection sense 170mV (TYP.). Shutdown time can be adjusted by CPRO. High Efficiency : 93% [TYP. PWM Mode@VIN=5.0V, VOUT=3.3V, IOUT=1A] Detect Voltage Function : Detects 0.9V/Open-drain output Stand-by Current : ISTB = 4.0μA (MAX.) Load Capacitor : Low ESR capacitor compatible Synchronous Bootstrap N-ch & N-ch Driver Package : TSSOP-16 Input Voltage Range Output Voltage Range ■TYPICAL APPLICATION CIRCUIT SD2 ■TYPICAL PERFORMANCE CHARACTERISTICS RSENSE VIN VDIN VIN CIN VDOUT VDIN VDOUT VL CVL CSS CSS CPRO XC9213 FB EXT2 VSENSE BST EXT1 LX Tr1 CBST L SD1 CFB RFB2 Tr2 RFB1 CL VOUT AGND MODE CE PGND CPRO 1/34 XC9213 Series ■PIN CONFIGURATION ■PIN ASSIGNMENT PIN NUMBER 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PIN NAME VIN VSENSE VL CE AGND MODE CPRO CSS VDIN FB VDOUT PGND EXT2 LX EXT1 BST Input Voltage Current Detection Local Power Supply Chip Enable Analog Ground PWM / Current Limit PFM Switch TSSOP-16 (TOP VIEW) FUNCTION Protection Time Setting Capacitor Connection Soft-start Capacitor Connection Voltage Detector Input (0.9V) Output Voltage Setting Resistor Connection Voltage Detector Output (Open-Drain) Power Ground Low Side N-ch Driver Transistor Coil Connection High Side N-ch Driver Transistor Bootstrap < Set output voltage freely by split resistors > ■CE PIN & MODE PIN FUNCTION CE PIN H L MODE PIN H L OPERATIONAL STATE Operation Shut down OPERATIONAL STATE Synchronous PWM Control Non-Synchronous PWM / Current Limit PFM Automatic Switching Control ■PRODUCT CLASSIFICATION ●Ordering Information XC9213B①②③④⑤ DESIGNATOR ①② ③ ④ ⑤ DESCRIPTION Reference Voltage Oscillation Frequency Package Device Orientation SYMBOL 10 3 V R L : 300kHz : TSSOP-16 : Embossed tape, standard feed : Embossed tape, reverse feed DESCRIPTION : 1.0V (Fixed) 2/34 XC9213 Series ■ABSOLUTE MAXIMUM RATINGS PARAMETER VIN Pin Voltage VSENSE Pin Voltage VL Pin Voltage CE Pin Voltage (*) MODE Pin Voltage (*) CPRO Pin Voltage CSS Pin Voltage VDIN Pin Voltage FB Pin Voltage VDOUT Pin Voltage EXT2 Pin Voltage Lx Pin Voltage EXT1 Pin Voltage BST Pin Voltage EXT1 Pin Current EXT2 Pin Current Lx Pin Current Power Dissipation Operational Temperature Range Storage Temperature Range SYMBOL VIN VSENSE VL CE MODE CPRO CSS VDIN FB VDOUT EXT2 Lx EXT1 BST IEXT1 IEXT2 ILx Pd Topr Tstg RATINGS - 0.3 ~ 30.0 - 0.3 ~ 30.0 - 0.3 ~ 6.0 - 0.3 ~ 30.0 - 0.3 ~ 30.0 - 0.3 ~ 6.0 - 0.3 ~ 6.0 - 0.3 ~ 6.0 - 0.3 ~ 6.0 - 0.3 ~ 30.0 - 0.3 ~ 6.0 - 0.3 ~ 30.0 - 0.3 ~ 30.0 - 0.3 ~ 30.0 ±100 ±100 100 350 - 40 ~ + 85 - 55 ~ + 125 Ta = 25OC UNITS V V V V V V V V V V V V V V mA mA mA mW O C O C (*) CE, MODE pin voltage 1) 1.4V≦High Level≦6V The CE pin and the MODE pin can be connected directly to the high level power supply. 2) 6V < High Level < 30V The CE pin and the MODE pin should be connected to over 1kΩ resistor when connecting 1.4V