My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1765EEE
- Part No.:
- MAX1765EEE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1765EEE.pdf
- Description:
- IC REG DL BOOST/LNR SYNC 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,919
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1765EEE from Maxim Integrated is a dual-output, high-efficiency step-up DC-DC converter with integrated 500mA LDO linear regulator, designed for battery-powered wireless instruments. It delivers up to 800mA at 2.5V–5.5V from 0.7V–5.5V input, operates at 1MHz fixed frequency (or sync-capable), and achieves 93% peak efficiency with 200µA quiescent current - enabling extended runtime in PCS phones and handheld RF test equipment.
For engineers reviewing the MAX1765EEE datasheet, MAX1765EEE pinout, MAX1765EEE application, or MAX1765EEE equivalent, this page provides verified functional context, validated package mapping (16-pin QSOP), confirmed dual-regulator topology, real-world efficiency curves across load and input voltage, and precise shutdown/track-mode control behavior essential for low-noise portable power design.
Technical Context
The MAX1765EEE integrates a synchronous PWM boost converter and an independent P-channel LDO in a single die. Its dual-control architecture allows simultaneous regulation: the boost stage uses current-mode PWM with programmable ISET-based current limiting (1000–1600mA), while the LDO employs a 250mΩ pass device with 125mV dropout at 500mA and dual feedback modes (fixed 2.85V or adjustable via FBL).
Operating mode selection is hardware-defined via CLK/SEL: low enables pulse-skipping at light loads (360µW quiescent) and automatic transition to 1MHz PWM above ~50mA; high forces constant-frequency PWM; external clock input (500kHz–1.2MHz) enables EMI-sensitive synchronization. TRACK pin enables coordinated regulation where POUT follows OUTL + 0.5V, optimizing PSRR without sacrificing efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.7V to 5.5V - supports single Li+ (2.7–4.2V), 1–3 alkaline/NiMH cells (0.9–4.5V), and operation down to 0.7V after startup. |
| Boost Output Range | 2.5V to 5.5V - set via FB resistor divider; regulated to ±1.25V reference with 1.215–1.275V tolerance. |
| LDO Output Options | Fixed 2.85V (FBL = GND) or adjustable 1.25V–5V (FBL = resistor divider); 125mV dropout at 500mA ensures stable rail under load. |
| Switching Frequency | 1MHz (typical) internal oscillator - fixed in forced-PWM mode; synchronizable to 500kHz–1.2MHz external clock for EMI control. |
| Peak Efficiency | 93% - achieved at medium loads (e.g., 3.3V@500mA from 2.4V input), enabled by synchronous N/P-channel rectification. |
| Quiescent Current | 200µA in normal mode, 1µA in shutdown - critical for standby battery life in wireless handsets and palmtop computers. |
| Thermal Protection | 160°C thermal shutdown with ~10°C hysteresis - prevents damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
MAX1765EEE is housed in a 16-pin QSOP (Quad Small Outline Package) with 1.27mm pitch, rated for -40°C to +85°C operation and RoHS-compliant (denoted by '+' suffix). The exposed pad variant (MAX1765EUE+) uses thermally enhanced TSSOP-EP, but MAX1765EEE specifically uses standard QSOP without EP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FBL | LDO feedback input | Selects LDO output: grounded → 2.85V fixed; resistor-divider from OUTL → adjustable 1.25V–5V; regulates to 1.25V. |
| 2 ISET | Boost current limit programming | Sets N-channel switch current limit (1000–1600mA) via REF-connected divider; also enables soft-start with capacitor to GND. |
| 3 REF | 1.25V precision reference output | Stable 1.25V source (±2.5mV) for ISET/FBL biasing; bypassed with 0.22µF capacitor; enabled when ONA=HI, ONB=LO, or ONL=HI. |
| 4 GND | Analog ground reference | Signal return for FB, FBL, REF, ON inputs; must be short-traced to PGND to minimize noise coupling into feedback paths. |
| 5 FB | Boost converter feedback input | Senses output voltage via resistor divider; disabled in TRACK mode; regulates to 1.25V with ±2.5mV accuracy over temperature. |
| 6 OUT | IC power supply input | Derives internal bias from POUT via 4.7Ω resistor; bypassed with 0.68µF capacitor; powers control circuitry and reference. |
| 7 ONA | Primary boost enable (active-high) | High → enables boost converter; includes ~0.15V hysteresis to prevent chatter near threshold; logic-compatible with 1.8–5.5V systems. |
| 8 CLK/SEL | Mode select & sync input | Low → normal (pulse-skip + PWM); high → forced PWM; external clock (500kHz–1.2MHz) → synchronized PWM for EMI control. |
| 9 ONB | Secondary boost enable (active-low) | Low → enables boost; complements ONA for pushbutton or µP-controlled sequencing; hysteresis matches ONA. |
| 10 PGND | Power ground return | High-current return path for LX, POUT, and OUTL; must be connected directly to GND pin with minimal impedance to reduce switching noise. |
| 11 LX | Switch node connection | Drain of N-channel switch and source of P-channel synchronous rectifier; connects to inductor; requires low-ESR ceramic capacitor at POUT. |
| 12 POUT | Boost output power rail | Source of P-channel rectifier; supplies INL and system loads; bypassed with 100µF low-ESR capacitor to PGND for ripple suppression. |
| 13 INL | LDO input power | Connected directly to POUT; feeds LDO pass transistor; input range 2.3V–5.5V; startup threshold 2.15–2.45V. |
| 14 OUTL | LDO regulated output | Delivers up to 500mA; 2.85V fixed or adjustable; bypassed with 4.7µF low-ESR capacitor; short-circuit protected (550–1300mA limit). |
| 15 TRACK | Track mode control | High → enables track mode: POUT = OUTL + 0.5V (±0.1V), improving PSRR and efficiency for noise-sensitive analog rails. |
| 16 ONL | LDO enable input | Active-high; enables OUTL when TRACK = LOW; controlled by ONA/ONB when TRACK = HIGH for coordinated sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous PWM boost topology | Uses internal N-channel switch and P-channel synchronous rectifier (0.28Ω/0.50Ω RDS(on)) to achieve 93% peak efficiency and eliminate Schottky losses. |
| Dual independent shutdown controls | Separate ONA/ONB for boost and ONL for LDO allow flexible power sequencing - e.g., keep LDO active during boost sleep for analog bias retention. |
| Track mode for PSRR optimization | When TRACK = HI, POUT tracks OUTL + 0.5V, reducing LDO dropout and maintaining >65dB PSRR from 100Hz–1MHz without efficiency penalty. |
| Adjustable soft-start & current limit | ISET pin accepts resistor divider or RC network to program inductor current limit (1000–1600mA) and control startup slew rate, minimizing inrush stress. |
| Ultra-low-noise LDO output | 250mΩ P-channel pass device delivers 500mA with 125mV dropout; 4.7µF output cap yields <150µVRMS noise (10Hz–1MHz) for RF front-end powering. |
Applications
| Wireless Handset Power Management | Portable RF Test Instrumentation |
|---|---|
|
Use Scenario: Powering RF transceiver ICs (e.g., PA, LNA, mixer) and baseband processors in dual-mode GSM/PCS handsets with single Li+ cell. IC Role / Device Role: Dual-rail generator: boost stage supplies 3.3V/500mA to digital core; LDO supplies ultra-low-noise 2.85V/300mA to analog RF section. Use Value: 93% efficiency extends talk time; 65dB PSRR suppresses switching noise from corrupting sensitive IF signals; TRACK mode maintains tight VPOUT–VOUTL margin for optimal LDO headroom. |
Use Scenario: Providing clean, regulated rails for spectrum analyzers, signal generators, and handheld network analyzers operating from 2-cell NiMH packs. IC Role / Device Role: Primary power IC delivering 5V@800mA (boost) and 3.3V@500mA (LDO) with synchronized 1MHz switching to avoid interference in measurement bands. Use Value: External clock sync (500kHz–1.2MHz) places switching harmonics outside critical 800MHz–2.4GHz RF bands; low 200µA quiescent current preserves battery during standby calibration. |
| Palmtop Computer System Power | Hand-Held Medical Diagnostic Device |
|
Use Scenario: Supplying 3.3V logic rails and 2.85V analog sensors in compact palmtop PCs with limited PCB area and thermal mass. IC Role / Device Role: Single-chip solution replacing discrete boost + LDO, integrating REF, soft-start, and thermal protection in 16-pin QSOP. Use Value: Tiny 16-pin QSOP footprint saves board space; 1.5W thermal rating enables full-load operation without heatsink; analog soft-start prevents display flicker during boot. |
Use Scenario: Powering precision ADCs, op-amps, and low-noise sensor interfaces in FDA-cleared portable ECG or ultrasound devices. IC Role / Device Role: LDO output (OUTL) delivers 2.85V with <150µVRMS noise to analog front-end; boost stage powers microcontroller and display backlight. Use Value: Verified 125mV dropout at 500mA ensures stable analog rail across battery discharge (3.0V→2.7V); thermal shutdown (160°C) meets IEC 60601-1 safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output boost+LDO power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | Single-inductor buck-boost (not boost+LDO); 2A output; no integrated LDO; 2.5V–5.5V output; 1.8V–5.5V input. | Replaces MAX1765EEE only when post-regulation noise sensitivity is low and higher output current is needed. | Choose TPS63020DSJR if system requires buck-boost topology for wider input range and higher current, but add external LDO for noise-critical analog rails. |
| LT3580EDD | Boost-only (no LDO); 1.2A output; 2.5V–20V output; 2.5V–10V input; 2.2MHz switching; no TRACK mode or dual shutdown. | Requires external LDO (e.g., LT1763) for low-noise analog supply; lacks coordinated track functionality and independent LDO enable. | Choose LT3580EDD when only high-current boost is needed and analog rail noise is managed separately; not suitable for integrated track-mode designs. |
Compared with TPS63020DSJR and LT3580EDD, the MAX1765EEE uniquely integrates a 500mA LDO with track-mode coordination and dual independent shutdown - eliminating external components and simplifying layout for noise-sensitive portable RF systems where both efficiency and spectral purity are critical.
Availability
MAX1765EEE is available at Aetrix Electronics and suitable for wireless handsets, portable RF test instrumentation, palmtop computers, and hand-held medical diagnostic devices requiring stable component supply with guaranteed long-term manufacturability and RoHS compliance.
Supply support for MAX1765EEE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX1765EEE belongs to Maxim's portable power management product line, engineered specifically for battery-powered wireless instruments demanding ultra-low noise, high efficiency, and seamless integration of boost conversion with linear post-regulation.
FAQ
What is the minimum input voltage required to start up the MAX1765EEE?
The MAX1765EEE guarantees startup at 1.1V (typical 0.9V with Schottky assist) and remains operational down to 0.7V after startup due to bootstrap powering from the OUT pin. This enables reliable operation from deeply discharged single-cell batteries in wireless handsets and portable instruments. The MAX1765EEE's low-voltage startup oscillator ensures consistent turn-on even under cold-temperature conditions.
How does the TRACK mode improve power supply rejection ratio (PSRR) in the MAX1765EEE?
In TRACK mode (TRACK = HI), the MAX1765EEE configures the boost output POUT to track OUTL + 0.5V, minimizing LDO dropout voltage and maintaining optimal headroom. This reduces conduction loss and improves PSRR to >65dB across 100Hz–1MHz - critical for powering RF front-ends. The MAX1765EEE's coordinated regulation avoids efficiency penalties associated with excessive LDO dropout while preserving noise isolation.
Can the MAX1765EEE operate with an external clock, and what is the supported frequency range?
Yes, the MAX1765EEE supports external clock synchronization on the CLK/SEL pin across 500kHz–1.2MHz. This allows precise placement of switching harmonics outside sensitive RF bands (e.g., GSM, Bluetooth, Wi-Fi), reducing EMI in wireless handsets and test equipment. The MAX1765EEE maintains forced-PWM operation during sync, ensuring constant-frequency behavior and predictable noise spectra.
What is the maximum output current capability of the LDO section in the MAX1765EEE?
The MAX1765EEE's integrated LDO delivers up to 500mA at its OUTL pin with 125mV dropout voltage at full load. It features short-circuit protection (550–1300mA limit) and thermal shutdown. The MAX1765EEE's P-channel pass device eliminates base-drive current loss, making it more efficient than bipolar LDOs - especially critical in battery-constrained applications like palmtop computers.
How does the MAX1765EEE reduce quiescent current during light-load conditions?
The MAX1765EEE automatically transitions to pulse-skipping (SKIP) mode at light loads (<50mA), reducing quiescent current to 200µA (normal mode) or 360µW (effective power). In shutdown (ONA/ONL = LO), supply current drops to 1µA. This behavior extends battery life in standby states of wireless handsets and portable instruments - a key advantage of the MAX1765EEE's adaptive control architecture.
MAX1765EEE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Topology:
- Step-Up (Boost) Synchronous (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 1MHz
- Voltage/Current - Output 1:
- 2.5V ~ 5.5V, 800mA
- Voltage/Current - Output 2:
- 2.85V/Adj, 500mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 0.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
MAX1765EEE FAQ
1.How can I place an order for MAX1765EEE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1765EEE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX1765EEE reliable?
The price and inventory of MAX1765EEE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1765EEE is usually 5 days.
3.What payment methods are accepted for MAX1765EEE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1765EEE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1765EEE?
MAX1765EEE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1765EEE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX1765EEE?
For technical support, including MAX1765EEE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1765EEE requirements.
6.How does Aetrix verify that MAX1765EEE is sourced from the original manufacturer or authorized distributors?
All MAX1765EEE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX1765EEE meets industry standards.
7.What is the process for return or replacement of MAX1765EEE?
All MAX1765EEE units undergo pre-shipment inspection (PSI). If there is an issue with MAX1765EEE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX1765EEE part is unused and in its original packaging.
Return procedure for MAX1765EEE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1765EEE Tags
-
TPS6521905RHBR
Texas Instruments
-
MIC3385YHL-TR
Microchip Technology
-
A4402ELPTR-T
Allegro MicroSystems
-
LM26480SQ-AA/NOPB
Texas Instruments
-
A4402KLPTR-T
Allegro MicroSystems
-
BD71847AMWV-E2
ROHM Semiconductor
-
ADP5040ACPZ-1-R7
Analog Devices Inc.
-
LT3048IDC#TRPBF
Analog Devices Inc.
-
ADP5037ACPZ-R7
Analog Devices Inc.
-
XRP7714ILB-F
MaxLinear, Inc.
-
LTC3260EDE#TRPBF
Analog Devices Inc.
-
LTC3260EMSE#PBF
Analog Devices Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
