MAX1951ESA-TG05 Maxim Integrated Products, MAX1951ESA-TG05 Datasheet
MAX1951ESA-TG05
Specifications of MAX1951ESA-TG05
Related parts for MAX1951ESA-TG05
MAX1951ESA-TG05 Summary of contents
Page 1
... Operate from 2.6V to 5.5V Supply ♦ Adjustable Output from 0. ♦ Preset Output of 1.8V (1.5% Accuracy) (MAX1952) ♦ Internal Digital Soft-Soft ♦ Short-Circuit and Thermal-Overload Protection Applications PART MAX1951ESA+ -40°C to +85° MAX1952ESA+ -40°C to +85° +Denotes a lead(Pb)-free/RoHS-compliant package. 2. ...
Page 2
All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators ABSOLUTE MAXIMUM RATINGS IN GND ........................................................-0.3V to +6V CC COMP, FB, REF to GND .............................-0. Current (Note 1).........................................................±4.5A PGND to GND .............................................Internally Connected ...
Page 3
All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators ELECTRICAL CHARACTERISTICS (continued 3.3V, PGND = GND regulation +25°C.) A PARAMETER On-Resistance, ...
Page 4
All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators ELECTRICAL CHARACTERISTICS (continued 3.3V, PGND = GND regulation PARAMETER COMP COMP Transconductance From FB to COMP, V COMP Clamp Voltage, ...
Page 5
All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators (Typical values are 5V EFFICIENCY vs. LOAD CURRENT ( 5V 100 V = 3.3V OUT 90 ...
Page 6
All Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators (Typical values are 5V SWITCHING WAVEFORMS 0A 0V 200ns/div SOFT-START WAVEFORMS 1ms/div 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) = 1.5V, ...
Page 7
All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators Pin Description PIN NAME FUNCTION Supply Voltage. Bypass capacitor to ground and 10Ω resistor to IN. Reference Bypass. Bypass REF with 0.1µF 2 REF capacitor ...
Page 8
All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators V CC RAMP GEN COMP Figure 1. Functional Diagram through the high-side MOSFET body diode, back to the input, until the beginning of the next cycle or until the ...
Page 9
All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators Design Procedure Output Voltage Selection: Adjustable (MAX1951) or Preset (MAX1952) The MAX1951 provides an adjustable output voltage between 0.8V and V . Connect FB to output for 0.8V IN ...
Page 10
All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators Typical Operating Characteristics), the controller responds by regulating the output voltage back to its nominal state. The controller response time depends on the closed-loop bandwidth. A higher bandwidth yields ...
Page 11
All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators gmc = 4. 1MHz SWITCH 1.5V/1 1Ω LOAD OUT OUT(MAX [1/(2π MOD ...
Page 12
... TO 5.5V C1 10μF C2 220pF Figure 2a. MAX1951 Adjustable Output Typical Application Circuit 2.6V TO 5.5V C1 10μF C2 220pF Figure 2b. MAX1952 Fixed-Output Typical Application Circuit 12 ______________________________________________________________________________________ 10Ω MAX1951ESA 0.1μ 51.1kΩ COMP REF GND PGND OFF 0.1μF R5 10kΩ OUTPUT OPTIONAL ...
Page 13
... All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators 3.3V ±5% C1 10μF L1: TOKO A915AY-1R1M C1: TAIYO YUDEN JMK316BJ106ML C4: TAIYO YUDEN JMK325BJ226MM Figure 2c. MAX1951 Typical Application Circuit with 2A Output ______________________________________________________________________________________ 10Ω MAX1951ESA 0.1μ 100kΩ COMP GND OFF 100pF R5 10kΩ ...
Page 14
All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators Table 2. External Components List ...
Page 15
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...