MAX1678EUA+ by Analog Devices

1 Cell to 2 Cell, Low-Noise, High-Efficiency, Step-Up DC-DC Converter

Status: Active
Series: MAX1678
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

The MAX1678 is a high-efficiency, low-voltage, synchronous-rectified, step-up DC-DC converter intended for use in devices powered by 1 to 3-cell alkaline, NiMH, or NiCd batteries or a 1-cell lithium battery. It guarantees a 0.87V start-up voltage and features a low 37µA quiescent supply current. The device includes a 1Ω, N-channel MOSFET power switch, a synchronous rectifier that acts as the catch diode, a reference, pulse-frequency-modulation (PFM) control circuitry, and circuitry to reduce inductor ringing-all in an ultra-small, 1.1mm-high µMAX® package. The output voltage is preset to 3.3V or can be adjusted from +2V to +5.5V using only two resistors. Efficiencies up to 90% are achieved for loads up to 50mA. The device also features an independent undervoltage comparator (PFI/PFO) and a logic-controlled 2µA shutdown mode.

Prices starting from US$1.76


Distributor Starting From Stock
Logo for CoreStaff CoreStaff US$1.76
290
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Logo for Newark Electronics Newark Electronics US$3.32
111
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Logo for element14 element14 US$3.16
111
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Logo for Transfer Multisort Elektronik Transfer Multisort Elektronik US$3.82
20
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Logo for Schukat Electronic Schukat Electronic US$3.05
15
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Features

0.87V Guaranteed Start-Up
Up to 90% Efficiency
Built-In Synchronous Rectifier (no external diode)
Ultra-Small µMAX Package, 1.1mm High
37µA Quiescent Current (85µA from 1.5V battery)
2µA Logic-Controlled Shutdown
Power-Fail Detector
Dual Mode™ Output: Fixed 3.3V
Dual Mode Adjustable 2V to 5.5V
45mA Output Current at 3.3V for 1-Cell Input
90mA Output Current at 3.3V for 2-Cell Input
Inductor-Damping Switch Suppresses EMI

Specifications

VIN (V) (min) 0.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 2
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 0.09
Switch Type Internal
Preset VOUT (V) 3
Output Adjust. Method PresetResistor
Power Good Signal Yes
Synchronous Switching? Yes
IQ (mA) (typ) 0.037
Shutdown Mode Supply Current (µA) (typ) 0.1
Shutdown Mode Supply Current (µA) (max) 1
# DC-DC Outputs 1
Package/Pins UMAX/8
BudgetaryPrice (See Notes) 2.03


MAX1678EUA+ Semiconductors - ICs by Analog Devices

DC/DC CONV SYNC BOOST 150KHZ UMAX-8

Status: Unknown
Series: -
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

Specifications

Topology Synchronous Boost (Step Up)
Input Voltage Min 700mV
Input Voltage Max 5.5V
DC / DC Converter IC Case µMAX
No. of Pins 8Pins
Output Current 90mA
Output Voltage Nom. 3.3V
Switching Frequency 150kHz
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

Dc/Dc Conv, Sync Boost, 150Khz, Umax-8 | Newark Electronics
DC/DC CONV, SYNC BOOST, 150KHZ, UMAX-8 | element14
IC: PMIC | Transfer Multisort Elektronik
Boost Sw. Reg 3,3V/Adj 90mA µMAX8 | Schukat Electronic

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX1678EUA+ ?

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Is the MAX1678EUA+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX1678EUA+ have stock available?

Authorised distributors including CoreStaff, Newark Electronics, element14, Farnell and Transfer Multisort Elektronik have stock available or on a lead time for MAX1678EUA+ .

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