Datasheet MAX20343, MAX20344 (Maxim) - 8

link to page 23 link to page 23 MAX20343/MAX20344 Ultra-Low Quiescent Current, Low Noise 3.5W Buck-Boost Regulator
Electrical Characteristics
(VIN = +1.8V to +5.5V, CIN = 5µF, COUT = 8µF, TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C, VIN = +3.7V, L = 1μH, Limits are 100% tested at TA = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS BUCK-BOOST
Input Voltage Range VIN_START Input voltage required for startup (Note 2) 1.9 5.5 V SwoFrcIN = 1, TA = 3.51 5 +85°C (MAX20343) Quiescent Supply IQ No load, VOUT = µA SwoFrcIN = 1, TA = Current 5V, VIN = 3.7V +125°C 12.5 (MAX20344) IQ_FAST FAST = 1 35 μA Shutdown Supply I Current SHDN I2C controlled 0.3 µA BBstFETScale = 0, L = 1µH, C 3.5 Integrator enabled, OUT = 8µF VIN > 2.7V, VOUT ≥ 3.2V BBstFETScale = 1, L = 2.2µH, COUT = 1.75 4µF BBstFETScale = 0, L = 1µH, COUT = 3.2 8µF, TA = +85°C (MAX20343) Maximum Output Operative Power (Note P BBstFETScale = 0, MAX W 3) L = 1µH, COUT = 2.9 8µF, T Integrator disabled, A = +125°C (MAX20344) VIN > 3.2V (Note 4), V BBstFETScale = 1, OUT ≥ 3.2V L = 2.2µH, COUT = 1.75 4µF, TA = +85°C (MAX20343) BBstFETScale = 1, L = 2.2µH, COUT = 1.6 4µF, TA = +125°C (MAX20344) 2.5 5.5 Output-Voltage Set 50mV step VIN < 2.1V, V V Range OUT resolution SwoFrcIN = 0 (see 3.2 5.5 the Input Operating Voltage section) Average Output-Voltage ACC_OUT I Accuracy OUT = 1mA, COUT_EFF = 8µF -2.4 +2.4 % Line Regulation Error VLINE_REG -1 +1 %/V Integrator enabled, VIN = 2.7V, VOUT = -1 3.3V, BBstFETScale = 0, POUT = 3.5W Load Regulation Error VLOAD_REG % Integrator disabled, VIN = 3.7V, VOUT = 5V, POUT = 1.5W, BBstFETScale = 1, -3.2 COUT = 4µF, L = 2.2µH www.maximintegrated.com Maxim Integrated | 8 Document Outline General Description Applications Benefits and Features Simplified Block Diagram Absolute Maximum Ratings Package Information 16-BUMP WLP 12-Pin FC2QFN Electrical Characteristics Electrical Characteristics (continued) Typical Operating Characteristics Typical Operating Characteristics (continued) Pin Configurations I2C-Controlled WLP Single-Pin-Enabled WLP I2C-Controlled FC2QFN Single-Pin-Enabled FC2QFN Pin Description Pin Description (continued) Functional Diagram Functional Diagram Detailed Description Startup Voltage Architectural Description Switching Phases Buck-Boost Mode Buck-Only Mode Inductor Peak and Valley Current Limits Integrator Control Loop Disable Input Operating Voltage Output Operating Power and Other Optimizations Device Control I2C-Controlled Single-Pin-Enabled Dynamic Voltage Scaling (DVS) RSEL Voltage Setting Register Map MAX20343/MAX20344 Register Details ChipID (0x00) BBstCfg0 (0x01) BBstVSet (0x02) BBstISet (0x03) BBstCfg1 (0x04) Status (0x05) Int (0x06) Mask (0x07) LockMsk (0x50) LockUnlock (0x51) Applications Information Input and Output Capacitance Inductor Selection Soft-Start I2C Interface Slave Address Start, Stop, and Repeated Start Conditions Bit Transfer Single-Byte Write Burst Write Single Byte Read Burst Read Acknowledge Bits Register Values Typical Application Circuits Optical Heart Rate LED Supply LPWAN Radio Supply Ordering Information Revision History