Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. SC59

Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. SOT23

Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. SOT25

Back to Inactive Datasheet Archive

AP2121 (NRND)

NRND = Not Recommended for New Design

High Speed, Extremely Low Noise LDO Regulator

Datasheet

Contact Sales

Description

The AP2121 series are positive voltage regulator ICs fabricated by CMOS process. Each of these ICs consists of a voltage reference, an error amplifier, a resistor network for setting output voltage, a current limit circuit for current protection and a chip-enable circuit (5-pin products only). The AP2121 series feature high supply voltage ripple rejection, low dropout voltage, low noise, high output voltage accuracy, and low current consumption which make them ideal for use in various battery-powered devices. The AP2121 series have 1.2V, 1.3V, 1.5V, 1.8V, 2.5V, 2.8V, 2.85V, 3.0V, 3.2V and 3.3V versions.

Feature(s)

· Low Dropout Voltage at IOUT=100mA: 150mV Typical (Except 1.2V, 1.3V and 1.5V Versions) · Low Standby Current: 0.1μA Typical · Low Quiescent Current: 25μA Typical · High Ripple Rejection: 70dB Typical (F=1kHz) · Output Current: More Than 200mA (300mA Limit) · Extremely Low Noise: 30μVrms (10Hz to 100kHz) · Excellent Line Regulation: 4mV Typical · Excellent Load Regulation: 12mV Typical · High Output Voltage Accuracy: ±2% · Excellent Line Transient Response and Load Transient Response · Compatible with Low ESR Ceramic Capacitor (as Low as 1μF)

Application(s)

· Mobile Phones, Cordless Phones · Wireless Communication Equipment · Portable Games · Cameras, Video Recorders · Sub-board Power Supplies for Telecom Equipment · Battery Powered Equipment

Specifications & Technical Documents

Product Parameters

Accuracy 25C	2
AEC Qualified	No
Channels	1
Compliance (Only Automotive Supports PPAP)	Standard
Enable Active	Yes (High)
Features	Small-size
Fixed Vout (V)	1.2, 1.3, 1.5, 1.8, 2.5, 2.8, 3.0, 3.2, 3.3
I_OUT	0.2
Iout (A)	0.2
I_{Q (mA)}	25
Iq (typ) (µA)	25
Noise uV RMS 10-100 kHz	30
Output Discharge	No
Output options	Fixed
Power Good	No
PSRR	70
PSRR (dB) 1kHz	70
Reverse Protection	No
Type	LDO
VCTL Function	No
VDROPOUT (Max) (V) at Max Current and Max Ouput Voltage	0.5
Vin (Max) (V)	6
Vin (Min) (V)	2
V_OUT	3.3, 3.2, 3, 2.8, 2.5, 1.8, 1.5, 1.3, 1.2
Vout (max)	5.5
Vout (min)	1.2

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Purchase & Availability

Something went wrong with your request. Please try again later. If this problem continues, please contact Diodes support for assistance.

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products
PCN-2740	2025-06-16	2025-12-16	Product End of Life (EOL)
PCN-2575	2022-04-05	2022-07-05	Qualified Additional Bill of Material (BOM) - Lead Frame Raw Material (C19400 FH)