AP7345D-3333RH4-7 - Dual 300mA LDO 3.3V/3.3V X2-DFN1612-8 | Diodes Inc.
Teilenummer: AP7345D-3333RH4-7 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $0.62 | $0,62 |
| 10 | $0.55 | $5,50 |
| 100 | $0.46 | $46,00 |
| 500 | $0.38 | $190,00 |
| 1.000 | $0.31 | $310,00 |
| 3.000 | $0.26 | $780,00 |
AP7345D-3333RH4-7 Übersicht
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage approaches the output voltage, with dropout voltages typically a few hundred mV. LDOs sit within the broader power management IC hierarchy, above which are switching converters and battery management ICs; LDOs are favored in noise-sensitive rails because, unlike switchers, they introduce no switching ripple into the output.
The AP7345D family is specified with high PSRR, low output noise, and low quiescent current, making it ideal for primary-cell-powered systems such as those running from alkaline AA or AAA cells. Each rail is enabled independently, and the chip integrates short-circuit current limit and thermal shutdown protection. The CMOS process delivers a low RDSON pass element that minimizes dropout loss and extends battery life.
The two 300mA outputs share the same 3.3V fixed voltage in the -3333RH4-7 variant; the -3333 suffix denotes a 3.3V/3.3V fixed combination. The exposed-pad X2-DFN1612-8 package measures approximately 1.6mm x 1.2mm and offers a thermal path suitable for handheld and IoT power budgets. Enable pins allow individual rail sequencing for multi-supply MCUs and wireless SoCs.
Typical applications include portable consumer electronics, IoT sensors and wearables, BLE/Zigbee module supplies, single-cell Li-ion post-regulation rails, microcontroller core and RTC power, and battery-powered measurement devices. Designers often pair the AP7345D with a preceding buck regulator to step down from a USB or 1S Li-ion source before the LDO cleans up the rail.
When designing with the AP7345D, place the 1uF ceramic input and output capacitors as close to the pins as possible and use low-ESR X5R/X7R dielectrics to maintain loop stability. Because each output is rated 300mA, ensure that the sum of both loads does not push the package above its thermal limit; in most battery-powered uses, the 300mA per-rail limit is the binding constraint rather than dissipation.
This page synthesizes distributor pricing, drop-in same-package alternatives within the AP7345D family, and PCB layout notes not found in the manufacturer datasheet, giving engineers a faster sourcing decision than distributor catalog listings.
Drop-in-Alternativen für AP7345D-3333RH4-7 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit AP7345D-3333RH4-7 (gleiche Bauform und Footprint) – abweichend in Package, RoHS Status, Input Voltage Range, MSL Level, Protection Features.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
AP7345D-3030RH4-7
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AP7345D-1818RH4-7
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AP7345D-3330RH4-7
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AP7345D-2828RH4-7
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AP7345D-2518RH4-7
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AP7345D-3333RH4-7 Grenzwerte & elektrische Eigenschaften
| Topologie | Dual-channel LDO (Low-Dropout) linear regulator |
| Ausgangstyp | Fixed, positive |
| Anzahl der Ausgänge | 2 |
| Output Voltage (each rail) | 3.3 V |
| Output Current (each rail) | 300 mA |
| Process Technology | CMOS |
| Enable Function | Yes, independent per rail |
| Protection Features | Current limit, thermal shutdown |
| Gehäuse | X2-DFN1612-8 (8-pin, exposed pad) |
| Montageart | Surface Mount |
| Betriebstemperaturbereich | -40C to +85C |
| Tape and Reel Packing | Tape & Reel (RH4-7 suffix) |
| Output Capacitor Stability | Stable with small ceramic output capacitors |
| Application Focus | Battery-powered, primary-cell systems |
| RoHS-Status | Compliant |
AP7345D-3333RH4-7 Pin-Konfiguration
| Pin 1 | VIN1 — Input supply for LDO channel 1 |
| Pin 2 | EN1 — Enable for LDO channel 1 (active high) |
| Pin 3 | VOUT1 — Regulated output 1 (3.3V) |
| Pin 4 | GND — Common ground |
| Pin 5 | VIN2 — Input supply for LDO channel 2 |
| Pin 6 | EN2 — Enable for LDO channel 2 (active high) |
| Pin 7 | VOUT2 — Regulated output 2 (3.3V) |
| Pin 8 | EP — Exposed thermal pad, connect to GND copper pour |
Typische Anwendungen
AP7345D-3333RH4-7 ist geeignet für 6 Anwendungs: Battery-Powered IoT Sensor Node, BLE or Zigbee Module Supply, Post-Regulation After Buck Converter, Portable Consumer Electronics, Industrial Sensor and Meter, Single-Cell Li-ion Powered Device.
Battery-Powered IoT Sensor Node
The AP7345D-3333RH4-7 fits battery-powered IoT sensor nodes because each of its two 300mA rails can independently power a wireless SoC and a sensor ASIC from a 1S Li-ion or 2xAA alkaline source. Its low quiescent current extends battery life during sleep, and the high PSRR rejects noise from upstream DC-DC converters. Place 1uF X7R ceramics at VIN and each VOUT, and use the EN pins to power-gate the sensor rail when the node sleeps. Compared with a switching regulator, this LDO adds no switching noise to RF rails that share the same PCB.
Empfohlen
BLE or Zigbee Module Supply
The AP7345D-3333RH4-7 is a natural fit for BLE and Zigbee module power because its dual 3.3V rails can feed both the radio SoC and a companion sensor or PA stage while its high PSRR rejects ripple from a preceding buck converter. The 300mA per-rail rating covers most 2.4GHz radio bursts, and the small X2-DFN1612-8 footprint (1.6x1.2mm) suits the module form factor. Enable sequencing on EN1 and EN2 lets the host MCU gate the PA rail until the radio is initialized.
Empfohlen
Post-Regulation After Buck Converter
Use the AP7345D-3333RH4-7 as a post-regulator after a switching buck to deliver ultra-low-noise 3.3V to noise-sensitive analog blocks. The LDO's high PSRR cleans up switching ripple above 10kHz that the buck cannot fully remove, while the 300mA per-rail limit suits op-amps, ADCs, and analog front-ends. Running two LDOs in parallel from independent rails lets one supply digital and the other supply analog, breaking ground loops on a shared PCB.
Empfohlen
Portable Consumer Electronics
The AP7345D-3333RH4-7 powers portable consumer products like wearables and handheld meters by providing two 3.3V rails from a single Li-ion source. Its CMOS architecture delivers low quiescent current during standby and the small X2-DFN1612-8 package fits inside devices under 10mm thick. Pair one rail to the display backlight driver and the other to the main MCU, using EN1/EN2 to independently power-gate them and extend battery life between charges.
Empfohlen
Industrial Sensor and Meter
The AP7345D-3333RH4-7 supports industrial sensor and meter designs running on 24V bus or 4-20mA loops, where the LDO cleans up a pre-regulated 5V rail into clean 3.3V for an MCU and an ADC. The exposed thermal pad dissipates heat across a small copper pour, and the -40C to +85C operating range covers industrial enclosures. Each rail's 300mA rating supports a small LCD display plus a sensor ASIC on a shared PCB.
Empfohlen
Single-Cell Li-ion Powered Device
The AP7345D-3333RH4-7 suits single-cell Li-ion powered devices because its input range covers the 3.0V to 4.2V battery curve. The LDO holds 3.3V output until VIN drops to about 3.5V, then tracks the battery down to the under-voltage cutoff, providing the system with a regulated rail until the battery management IC signals low-battery. Two rails feed the MCU core and a sensor or wireless stage, both protected by independent EN control.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für AP7345D-3333RH4-7 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | AP7345D-3030RH4-7 | AP7345D-1818RH4-7 | AP7345D-3330RH4-7 | AP7345D-2828RH4-7 | AP7345D-2518RH4-7 |
|---|---|---|---|---|---|---|
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated |
| Package | X2-DFN1612-8 | X2-DFN1612-8 - same | X2-DFN1612-8 - same | X2-DFN1612-8 - same | X2-DFN1612-8 - same | X2-DFN1612-8 - same |
| Output Voltage (Rail 1 / Rail 2) | 3.3V / 3.3V | 3.0V / 3.0V | 1.8V / 1.8V | 3.3V / 3.0V | 2.8V / 2.8V | 2.5V / 1.8V |
| Output Current per Rail | 300 mA | 300 mA | 300 mA | 300 mA | 300 mA | 300 mA |
| Number of Outputs | 2 | 2 | 2 | 2 | 2 | 2 |
| Process Technology | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS |
| Independent Enables | Yes (EN1, EN2) | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Wichtigste Unterscheidungsmerkmale
- Dual independent 3.3V outputs in a single 1.6x1.2mm package (vs. AP7345D-3330RH4-7)
- Higher output voltage option within the same AP7345D family (vs. AP7345D-1818RH4-7)
- Symmetric dual outputs vs asymmetric voltage split (vs. AP7345D-2518RH4-7)
Designhinweise
Place the 1uF ceramic input and output capacitors as close as possible to the VIN1/VIN2 and VOUT1/VOUT2 pins respectively. Use X5R or X7R 0603-size 6.3V-rated capacitors to minimize impedance at the LDO control loop bandwidth. The exposed thermal pad (EP) must be soldered to a ground copper pour of at least 5x5mm to provide adequate heat spreading for the dual 300mA outputs.
Estimated: at VIN=4.2V (Li-ion), VOUT=3.3V, and 300mA per rail, each LDO dissipates approximately (4.2 - 3.3) * 0.3 = 0.27W; combined dissipation is ~0.54W. With the X2-DFN1612-8 thermal resistance on a 5x5mm copper pour, the junction temperature rise is well below 30C above ambient. Derate one or both rails if the input voltage is much higher or the load is sustained above 250mA.
Do not leave the EN1/EN2 pins floating - tie each through a 100k resistor to its VIN rail or directly to the system controller GPIO. Floating enables can cause unpredictable power-up behavior and back-feeding through the ESD structures. Also ensure each VOUT capacitor's dielectric (X5R/X7R) and voltage rating handle the maximum expected transient; 6.3V ceramics are typically adequate for 3.3V outputs.
Compliance-Informationen
RoHS and lead-free per Diodes Incorporated product page for AP7345D family. The AP7345D is not AEC-Q100 qualified; for automotive applications consult Diodes Incorporated automotive-grade portfolio.
