MAX8815AETB+ MAXIM [Maxim Integrated Products], MAX8815AETB+ Datasheet
MAX8815AETB+
Related parts for MAX8815AETB+
MAX8815AETB+ Summary of contents
Page 1
... Internal Compensation ♦ Overload/Short-Circuit Protection ♦ 0.1µA Shutdown Current ♦ Thermal Shutdown ♦ Compact 10-Pin, 3mm x 3mm TDFN Package PART Applications MAX8815AETB+ + Denotes a lead-free package Exposed pad. Note: This device operates in the -40°C to +85°C extended operating temperature range. INPUT VOLTAGE 1.2V TO 5.5V ...
Page 2
Efficiency, 30µA Quiescent Current Step-Up Converter with True Shutdown ABSOLUTE MAXIMUM RATINGS OUTS, BATT to GND ................................................-0.3V to +6V POUT to OUTS ......................................................-0.3V to +0.3V PGND (EP) to AGND .............................................-0.3V to +0. GND ................................................-0. ...
Page 3
Efficiency, 30µA Quiescent Current Step-Up Converter with True Shutdown ELECTRICAL CHARACTERISTICS (continued 5V 3.6V, V OUTS POUT ON BATT noted. Limits are 100% production tested at T characterization.) PARAMETER DC-DC ...
Page 4
Efficiency, 30µA Quiescent Current Step-Up Converter with True Shutdown ( 5V 3.6V, V OUTS POUT BATT ON EFFICIENCY vs. LOAD CURRENT, V 100 V = 1.8V, SKIP 1.5V, ...
Page 5
Efficiency, 30µA Quiescent Current Step-Up Converter with True Shutdown ( 5V 3.6V, V OUTS POUT BATT ON EP TEMPERATURE vs. INPUT VOLTAGE 120 OUT T = +25°C A ...
Page 6
Efficiency, 30µA Quiescent Current Step-Up Converter with True Shutdown ( 5V 3.6V, V OUTS POUT BATT ON HEAVY-LOAD SWITCHING WAVEFORMS V OUT 200ns/div LIGHT-LOAD SWITCHING WAVEFORMS (SKIPB ...
Page 7
Efficiency, 30µA Quiescent Current Step-Up Converter with True Shutdown PIN NAME Inductor Connection. LX pins are internally connected. Connect the LX pins to the switched side the inductor high impedance in shutdown. ...
Page 8
Efficiency, 30µA Quiescent Current Step-Up Converter with True Shutdown 3V + OUTS - ON ON GND REFERENCE Detailed Description The MAX8815A current-mode step-up DC-DC switching converter uses a fixed-frequency PWM architecture with True Shutdown. In normal mode, the ...
Page 9
Efficiency, 30µA Quiescent Current Step-Up Converter with True Shutdown INPUT VOLTAGE 1.2V TO 5.5V C1 10μF NORM INPUT VOLTAGE 1.2V TO 5.5V C1 10μF Figure 1. Typical Application Circuits _______________________________________________________________________________________ L 2μ BATT LX 9, ...
Page 10
Efficiency, 30µA Quiescent Current Step-Up Converter with True Shutdown DC-DC Converter The MAX8815A uses a current-mode PWM control scheme. The voltage difference between FB and an internal 1.265V (typ) reference generates an error sig- nal that programs the ...
Page 11
Efficiency, 30µA Quiescent Current Step-Up Converter with True Shutdown LOAD TRANSIENT MAX8815A toc18 V OUT 800mA I OUT 10mA 1ms/div Figure 2. Load Regulation 9% (a) HIGH-GAIN DC LOAD REGULATION WITH POOR TRANSIENT RESPONSE 3% (b) VOLTAGE POSITIONING ...
Page 12
Efficiency, 30µA Quiescent Current Step-Up Converter with True Shutdown Inductor Selection In most step-up converter designs, a reasonable induc- tor value can be derived from the following equation. This equation sets peak-to-peak inductor current at 1/2 the DC ...