Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - DC/DC voltage regulator Boost TSOT 23 5

General Description

The MAX1722/MAX1723/MAX1724 compact, high-efficiency,

step-up DC-DC converters are available in tiny, 5-pin

TSOT packages. They feature an extremely low 1.5μA

quiescent supply current to ensure the highest possible

light-load efficiency. Optimized for operation from one

to two alkaline or nickel-metal-hydride (NiMH) cells, or

a single Li+ cell, these devices are ideal for applications

where extremely low quiescent current and ultra-small

size are critical.

Built-in synchronous rectification significantly improves

efficiency and reduces size and cost by eliminating the

need for an external Schottky diode. All three devices

feature a 0.5Ω N-channel power switch. The MAX1722/

MAX1724 also feature proprietary noise-reduction circuitry,

which suppresses electromagnetic interference (EMI)

caused by the inductor in many step-up applications. The

family offers different combinations of fixed or adjustable

outputs, shutdown, and EMI reduction (see Selector

Guide).

Applications

Benets and Features

● Up to 90% Efficiency

● No External Diode or FETs Needed

● 1.5μA Quiescent Supply Current

● 0.1μA Logic-Controlled Shutdown

● ±1% Output Voltage Accuracy

● Fixed Output Voltage (MAX1724) or Adjustable

Output Voltage (MAX1722/MAX1723)

● Up to 150mA Output Current

● 0.8V to 5.5V Input Voltage Range

● 0.91V Guaranteed Startup (MAX1722/MAX1724)

● Internal EMI Suppression (MAX1722/MAX1724)

● TSOT Package (0.9mm typ Height)

● µDFN Package (2mm x 2mm x 0.75mm)

19-1735; Rev 5; 8/17

Ordering Information and Selector Guide appears at end of

data sheet.

● Pagers

● Remote Controls

● Remote Wireless

Transmitters

● Personal

Medical Devices

● Digital Still Cameras

● Single-Cell Battery-

Powered Devices

● Low-Power Hand-Held

Instruments

● MP3 Players

● Personal Digital

Assistants (PDA)

OUT

0.8V TO 5.5V

3.3V AT

UP TO 150mA

OFF

BATT

MAX1724

SHDN

GND

10µH

OUT

MAX1722/MAX1723/

MAX1724

1.5μA I

, Step-Up DC-DC

Converters in TSOT and µDFN

Typical Operating Circuit

Summary of content (13 pages)

PAGE 1
MAX1722/MAX1723/ MAX1724 1.5μA IQ, Step-Up DC-DC Converters in TSOT and µDFN General Description The MAX1722/MAX1723/MAX1724 compact, high-efficiency, step-up DC-DC converters are available in tiny, 5-pin TSOT packages. They feature an extremely low 1.5μA quiescent supply current to ensure the highest possible light-load efficiency.
PAGE 2
MAX1722/MAX1723/ MAX1724 1.5μA IQ, Step-Up DC-DC Converters in TSOT and µDFN Absolute Maximum Ratings Operating Temperature Range............................ -40°C to +85°C Junction Temperature.......................................................+150°C Storage Temperature Range............................. -65°C to +150°C Soldering Temperature Lead(Pb)-free packages...............................................+260°C Packages containing lead(Pb)......................................
PAGE 3
MAX1722/MAX1723/ MAX1724 1.5μA IQ, Step-Up DC-DC Converters in TSOT and µDFN Electrical Characteristics (continued) (VBATT = 1.2V, VOUT = 3.3V (MAX1722/MAX1723), VOUT = VOUT(NOM) (MAX1724), SHDN = OUT, RL = ∞, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL Shutdown Current into BATT CONDITIONS MAX1724 (Note 4) VIL SHDN Voltage Threshold VIH MAX1723/MAX1724 TA = +25°C TA = +85°C TYP MAX 0.001 0.5 0.
PAGE 4
MAX1722/MAX1723/ MAX1724 1.5μA IQ, Step-Up DC-DC Converters in TSOT and µDFN Typical Operating Characteristics (Figure 3 (MAX1723), Figure 7 (MAX1722), Figure 8 (MAX1724), VBATT = VIN = 1.5V, L = 10μH, CIN = 10μF, COUT = 10μF, TA = +25°C, unless otherwise noted.) 80 70 VIN = 1.5V 0.1 L = DO1606 1 10 70 100 50 1000 0.01 0.1 L = DO1606 1 10 100 MAX1722 toc03 VIN = 1.5V 70 60 VIN = 1.0V VIN = 1.5V VIN = 2.0V 80 1000 VIN = 1.0V 50 0.01 0.
PAGE 5
MAX1722/MAX1723/ MAX1724 1.5μA IQ, Step-Up DC-DC Converters in TSOT and µDFN Typical Operating Characteristics (continued) (Figure 3 (MAX1723), Figure 7 (MAX1722), Figure 8 (MAX1724), VBATT = VIN = 1.5V, L = 10μH, CIN = 10μF, COUT = 10μF, TA = +25°C, unless otherwise noted.) 3.3V MAX1722 toc10 SHUTDOWN RESPONSE MAX1722 toc09 LOAD-TRANSIENT RESPONSE 5V A VOUT 2V/div 0 50mA 2V B 0 VSHDN 1V/div 0 A: VOUT, 50mV/div B: IOUT, 20mA/div 200µs/div 1ms/div VIN = 3.3V, VOUT = 5.
PAGE 6
MAX1722/MAX1723/ MAX1724 1.5μA IQ, Step-Up DC-DC Converters in TSOT and µDFN Pin Configurations TOP VIEW BATT + 1 5 LX SHDN MAX1722 GND 2 1 GND 2 FB 3 TSOT FB 1 BATT 2 GND 3 LX BATT 1 MAX1723 FB 3 OUT 4 5 GND 2 4 OUT SHDN MAX1722 6 OUT 5 N.C. 4 LX FB 1 SHDN 2 GND 3 µDFN MAX1723 LX 4 OUT 6 OUT 5 N.C. 4 LX MAX1724 3 TSOT 5 TSOT 6 OUT SHDN 1 5 N.C.
PAGE 7
MAX1722/MAX1723/ MAX1724 1.5μA IQ, Step-Up DC-DC Converters in TSOT and µDFN OUT MAX1723 ZEROCROSSING DETECTOR STARTUP CIRCUITRY P SHDN CONTROL LOGIC DRIVER LX FB ERROR COMPARATOR 1.235V REFERENCE N CURRENT LIMIT GND Figure 1. MAX1723 Simplified Functional Diagram Detailed Description The MAX1722/MAX1723/MAX1724 compact, high-efficiency, step-up DC-DC converters are guaranteed to start up with voltages as low as 0.91V and operate with an input voltage down to 0.8V. Consuming only 1.
PAGE 8
MAX1722/MAX1723/ MAX1724 1.5μA IQ, Step-Up DC-DC Converters in TSOT and µDFN DAMPING SWITCH BATT OUT MAX1724 ZEROCROSSING DETECTOR STARTUP CIRCUITRY R2 P SHDN CONTROL LOGIC DRIVER ERROR COMPARATOR LX N R1 CURRENT LIMIT 1.235V REFERENCE GND Figure 2. MAX1724 Simplified Functional Diagram 10µH 1.2V TO VOUT 10µF SHDN LX OUT VOUT = 3.6V R2 2.37MΩ MAX1723 GND D1 10µF FB R1 1.24MΩ Figure 3.
PAGE 9
MAX1722/MAX1723/ MAX1724 1.5μA IQ, Step-Up DC-DC Converters in TSOT and µDFN VOUT VIN MAX1722 MAX1724 PDRV OUT P BATT DAMPING SWITCH TIMING CIRCUIT DAMP LX NDRV N GND Figure 4. Simplified Diagram of Damping Switch 1V/div 1V/div 1µs/div 1µs/div Figure 5. LX Ringing Without Damping Switch (MAX1723) Figure 6.
PAGE 10
MAX1722/MAX1723/ MAX1724 INPUT 0.8V TO VOUT 10µF 1.5μA IQ, Step-Up DC-DC Converters in TSOT and µDFN For maximum output current, choose the inductor value so that the controller reaches the current-limit before the maximum on-time is triggered: 10µH OUTPUT 2V TO 5.5V LX BATT OUT MAX1722 R2 10µF L< VBATT t ON(MAX) ILIM where the maximum on-time is typically 5μs, and the current limit (ILIM) is typically 500mA (see Electrical Characteristics table).
PAGE 11
MAX1722/MAX1723/ MAX1724 1.5μA IQ, Step-Up DC-DC Converters in TSOT and µDFN Table 2. Suggested Surface-Mount Capacitors and Manufacturers (C1 and C2) MANUFACTURER AVX CAPACITOR VALUE DESCRIPTION 1µF to 10µF X7R Ceramic 10µF to 330µF TAJ Tantalum Series TPS Tantalum Series PHONE WEBSITE 843-448-9411 www.avxcorp.com 1µF to 22µF X5R/X7R Ceramic 10µF to 330µF T494 Tantalum Series 68µF to 330µF T520 Tantalum Series Sanyo 33µF to 330µF TPC Polymer Series 408-749-9714 www.secc.co.
PAGE 12
MAX1722/MAX1723/ MAX1724 1.5μA IQ, Step-Up DC-DC Converters in TSOT and µDFN Selector Guide Package Information OUTPUT (V) SHDN LX DAMPING MAX1722EZK Adjustable No Yes MAX1723EZK Adjustable Yes No MAX1724EZK27 Fixed 2.7 Yes Yes MAX1724EZK30 Fixed 3.0 Yes Yes MAX1724EZK33 Fixed 3.3 Yes Yes MAX1724EZK50 Fixed 5.0 Yes Yes MAX1722ELT Adjustable No Yes MAX1723ELT Adjustable Yes No MAX1724ELT27 Fixed 2.7 Yes Yes MAX1724ELT30 Fixed 3.0 Yes Yes MAX1724ELT33 Fixed 3.
PAGE 13
MAX1722/MAX1723/ MAX1724 1.