AP7311-30WG-7 Equivalent & Substitute Parts

Part Overview

The AP7311-30WG-7 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 3V output at 150mA with a maximum dropout voltage of 0.3V. This active product operates across the industrial temperature range of -40°C to 85°C and is packaged in SOT-25 (SC-74A) surface mount configuration. The device includes integrated protection features for overcurrent, overtemperature, and short circuit conditions, with an enable control feature for power management applications.

Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements necessitate alternative electrical characteristics such as higher output current capacity, improved quiescent current performance, or extended operating temperature ranges.

Key Parameters

Parameter	Value	Unit
Output Voltage (Fixed)	3V	V
Output Current	150mA	mA
Input Voltage (Max)	6V	V
Dropout Voltage (Max)	0.3V @ 150mA	V
Quiescent Current	75 µA	µA
Operating Temperature	-40°C to 85°C	°C
Package Type	SOT-25 (SC-74A)	—
Protection Features	Overcurrent, Overtemperature, Short Circuit	—
Control Features	Enable	—

Substitute Part Grouping Explanation

Substitution eligibility for the AP7311-30WG-7 is determined by the following critical parameters:

Fixed output voltage of 3V
Output current capability of 150mA or greater
Maximum input voltage of 6V or greater
Dropout voltage performance suitable for the application
Surface mount packaging compatible with SOT-25 or equivalent footprints
Enable control feature availability
Protection against overcurrent and overtemperature conditions
Active product status with RoHS3 compliance

The substitute parts listed below meet these core requirements while offering variations in quiescent current, PSRR performance, operating temperature range, and package form factors. Selection among substitutes depends on specific application constraints regarding thermal performance, power efficiency, and environmental operating conditions.

Parameter Comparison

Parameter	AP7311-30WG-7	BU30SD2MG-MTR	BU30TD3WG-TR	MIC5317-3.0YD5-TR	TPS70630DBVR	TPS70630DBVT
Manufacturer	Diodes Inc.	Rohm Semi.	Rohm Semi.	Microchip	Texas Inst.	Texas Inst.
Output Voltage	3V	3V	3V	3V	3V	3V
Output Current	150mA	200mA	200mA	150mA	150mA	150mA
Input Voltage (Max)	6V	6V	6V	6V	6.5V	6.5V
Dropout Voltage (Max)	0.3V @ 150mA	0.15V @ 100mA	0.46V @ 200mA	0.31V @ 150mA	1.54V @ 150mA	1.54V @ 150mA
Quiescent Current	75 µA	80 µA	60 µA	39 µA	2.55 µA	2.55 µA
PSRR	65dB (100Hz)	68dB (1kHz)	70dB (1kHz)	80dB ~ 65dB (1kHz ~ 10kHz)	80dB ~ 52dB (10Hz ~ 1kHz)	80dB ~ 52dB (10Hz ~ 1kHz)
Operating Temperature	-40°C to 85°C	-40°C to 105°C	-40°C to 85°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Package	SOT-25	5-SSOP	5-SSOP	TSOT-23-5	SOT-23-5	SOT-23-5
Protection Features	OCP, OTP, SCP	OCP, OTP	OCP, OTP	OCP, OTP	OCP, OTP, RP, UVLO	OCP, OTP, RP, UVLO
RoHS3 Compliance	Yes	Yes	Yes	Yes	Yes	Yes

Engineering Selection Recommendations

All listed substitute parts maintain active product status and RoHS3 compliance, meeting baseline regulatory requirements for industrial and commercial applications.

BU30SD2MG-TR (Rohm Semiconductor) offers increased output current capacity at 200mA with superior dropout voltage performance (0.15V @ 100mA) and extended operating temperature to 105°C. This part qualifies for automotive applications under AEC-Q100 certification, providing enhanced reliability for temperature-sensitive environments.

BU30TD3WG-TR (Rohm Semiconductor) provides 200mA output current with improved quiescent current (60 µA) and higher PSRR (70dB @ 1kHz). Operating temperature remains at -40°C to 85°C, matching the primary part specification.

MIC5317-3.0YD5-TR (Microchip Technology) delivers the same 150mA output current with significantly lower quiescent current (39 µA) and extended operating temperature to 125°C. PSRR performance reaches 80dB at 1kHz, supporting noise-sensitive applications. Package form factor is TSOT-23-5.

TPS70630DBVR and TPS70630DBVT (Texas Instruments) both provide 150mA output with ultra-low quiescent current (2.55 µA), extended operating temperature to 125°C, and enhanced protection features including reverse polarity and UVLO. Higher dropout voltage (1.54V @ 150mA) requires evaluation against input voltage headroom constraints. These parts are functionally identical; inventory availability differs.

Frequently Asked Questions (FAQ)

Q: Can BU30SD2MG-MTR or BU30TD3WG-TR replace AP7311-30WG-7 in existing designs?

A: Both Rohm parts deliver the required 3V output with enhanced current capacity (200mA vs. 150mA). Package footprints differ (5-SSOP vs. SOT-25), requiring PCB layout verification. Electrical compatibility is confirmed across all critical parameters.

Q: What is the primary advantage of MIC5317-3.0YD5-TR?

A: Quiescent current is reduced to 39 µA compared to 75 µA in the primary part, reducing standby power consumption. Extended operating temperature to 125°C supports high-temperature applications. TSOT-23-5 packaging requires footprint confirmation.

Q: When should TPS70630DBVR or TPS70630DBVT be selected?

A: These parts excel in ultra-low power applications due to 2.55 µA quiescent current and extended temperature range to 125°C. Higher dropout voltage (1.54V) demands minimum 4.54V input to maintain 3V output at 150mA. Reverse polarity and UVLO protection provide additional circuit safeguards.

Q: Are package differences critical for substitution?

A: Yes. AP7311-30WG-7 uses SOT-25 (6-pin). Rohm parts use 5-SSOP, Microchip uses TSOT-23-5, and Texas Instruments use SOT-23-5. PCB footprint compatibility must be verified before design implementation. Pin assignments may differ.

Q: Do all substitutes support the enable control feature?

A: Yes. All listed substitutes include enable control functionality for power management applications.

Q: Which substitute offers the best dropout voltage performance?

A: BU30SD2MG-MTR provides the lowest dropout voltage at 0.15V @ 100mA, enabling operation with lower input voltage margins.

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