CM2593GSCS

CM2593/P 2A Step Down VOLTAGE REGULATOR GENERAL DESCRIPTION The CM2593/P is a monolithic integrated circuit that provide all the active functions for a step-down switching regulator, capable of driving a 2A load without additional transistor component. Requiring a minimum number of external component, the board space can be saved easily. The external shutdown function can be controlled by TTL logic level and then come into standby mode. The internal ◆ ◆ ◆ ◆ ◆ ◆ ◆ ◆ ◆ FEATURES ◆ ◆ 3.3V, 5V and adjustable output versions Adjustable version output voltage range, 1.23V to 37V +4% max over line and load condition SOP-8L packages Voltage mode non-synchronous PWM control Thermal-shutdown and current-limit protection ON/OFF shutdown control input Input voltage range up to 40V Output load current: 2A 150 kHz fixed frequency internal oscillator Low power standby mode Built-in switching transistor on chip compensation makes feedback control have good line and load regulation without external design. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage, and current limit is against over current operating of the output switch. The CM2593/P operates at a switching frequency of 150Khz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Other features include a guaranteed +4% tolerance on output voltage under specified input voltage and output load conditions, and +15% on the oscillator frequency. The output version included fixed 3.3V, 5V, and an adjustable type. The packages are available in a standard 8-lead SOP8. APPLICATIONS Simple High-efficiency step-down(buck) regulator Efficient pre-regulator for linear regulators On-card switching regulators Battery / Car Charger Positive to negative converter Digital Still and Video Cameras TYPICAL APPLICATIONS Figure 1. Basic Application Circuit with CM2593/P fixed version 2007/01/25 Rev. 1.4 Champion Microelectronic Corporation Page 1 CM2593/P 2A Step Down VOLTAGE REGULATOR PIN CONFIGURATION Sop08 Top View(CM2593) Sop08 Top View(CM2593P) BLOCK DIAGRAM 2007/01/25 Rev. 1.4 Champion Microelectronic Corporation Page 2 CM2593/P 2A Step Down VOLTAGE REGULATOR PIN DESCRIPTION Pin No. 1 2 3 4 5-8 Symbol Description VIN Out FB SD GND Operating voltage input Switching output Output voltage feedback control ON/OFF Shutdown Ground Pin ORDERING INFORMATION CM2593/P X X X Lead Free Blank: Normal G: Lead Free package Output Voltage C: Adjustable SC: 3.3V ZJC: 5V Package Type S: SOP-O8 package ABSOLUTE MAXIMUM RATINGS Symbol VCC VSD VFB VOUT PD TST TOP VOP θJa θJc Parameter Supply Voltage ON/OFF Pin input voltage Feedback Pin voltage Output voltage to Ground Power dissipation Storage temperature Operating temperature Operating voltage Thermal Resistance Thermal Resistance Rating +45 -0.3 to +25 -0.3 to +25 -1 Internally limited -65 to +150 -40 to +125 +4.5 to +45 75 14 Unit V V V V W o o C C V °/W °/W 2007/01/25 Rev. 1.4 Champion Microelectronic Corporation Page 3 CM2593/P 2A Step Down VOLTAGE REGULATOR ELECTRICAL CHARACTERISTICS(All Output Voltage Versions) Unless otherwise specified, VIN=12V for 3.3V, 5V, adjustable version and VIN=24V for the 12V version. ILOAD = 0.2A Symbol IB B Parameter Feedback bias current Conditions VFB=1.3V (Adjustable version only) TJ=25℃ -40℃