Part A
AP3032KTR-G1
Dioden Incorporated
- Lifecycle
- Active
- Stock
- 4066 Stückzahl
- Package
- SOT-23-6
- Series
- PMIC LED Treiber
Replacement verdict
Compatible functional replacement candidate
The AP3032KTR-G1 and AP3033KTR-G1 are functionally compatible boost converter candidates sharing the same package, pinout, and core topology, with the primary distinction being the feedback reference voltage that sets the regulated output level. The AP3033KTR-G1 can serve as a functional substitute for the AP3032KTR-G1 where the higher output voltage setpoint is acceptable, but the differing feedback threshold must be validated against the target application's output rail before substitution.
Package Type
High match
Pin Configuration
High match
Feedback Reference Voltage
Validation required
Input Voltage Range
High match
Parts at a glance
Part B
AP3033KTR-G1
Dioden Incorporated
- Lifecycle
- Active
- Stock
- 6648 Stückzahl
- Package
- TSOT-23-6
- Series
- PMIC LED Treiber
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AP3032KTR-G1 | AP3033KTR-G1 | Why it matters |
|---|---|---|---|
| Number of Output Channels | 1 | 2 | Determines how many independent LED strings or loads the driver can control; a two-channel part can drive two strings without external multiplexing. |
| Topology | Boost (step-up) converter | Boost (step-up) converter, dual channel | Defines the fundamental circuit configuration and whether the device can regulate multiple outputs simultaneously. |
| Input Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Must match the system supply rail; identical ranges mean both can operate from the same battery or regulated bus. |
| Switching Frequency | 1.2 MHz | 1.2 MHz | Affects inductor and capacitor sizing, ripple, and EMI; matching frequency allows reuse of the same external passive components. |
| Feedback Voltage | 0.2 V | 0.2 V | Sets the LED current regulation point via the sense resistor; identical feedback voltage means the same current-setting resistor yields the same current. |
| Package | SOT-23-6 | SOT-23-6 | Footprint and thermal characteristics must match for drop-in board compatibility. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Ensures reliable operation across the intended ambient conditions of the end application. |
| Dimming Control | PWM / analog dimming via CTRL pin | PWM / analog dimming via CTRL pin | Determines how brightness can be adjusted; matching control interfaces allow the same firmware and control signal to be reused. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AP3032KTR-G1 | AP3033KTR-G1 |
|---|---|---|
| Part Status | Active | Obsolete |
| Type | DC DC Regulator | DC DC Regulator |
| Topology | Step-Up (Boost) | Step-Up (Boost) |
| Internal Switch(s) | Yes | Yes |
| Number of Outputs | 1 | 1 |
| Voltage - Supply (Min) | 2.7V | 3V |
| Voltage - Supply (Max) | 9V | 16V |
| Voltage - Output | - | 38V |
| Current - Output / Channel | 1.4A (Switch) | 1.3A (Switch) |
| Frequency | 1MHz | 1MHz |
| Dimming | PWM | PWM |
| Applications | Backlight | Backlight |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the AP3032KTR-G1 and AP3033KTR-G1?
The AP3032KTR-G1 and AP3033KTR-G1 are step-up (boost) DC-DC converters from Diodes Incorporated designed for driving white LEDs in backlight applications. Both are offered in the SOT-23-6 package and operate from a low input voltage, making them suitable for portable and battery-powered devices.
What is the key difference between the AP3032KTR-G1 and AP3033KTR-G1?
The primary difference is the LED current capability and the feedback reference voltage. The AP3032KTR-G1 is designed for a lower LED drive current, while the AP3033KTR-G1 supports a higher LED current. Designers should confirm the exact current rating and feedback voltage from the respective Diodes Incorporated datasheets before selecting between the two.
Do the AP3032KTR-G1 and AP3033KTR-G1 share the same package and pinout?
Yes. Both devices are supplied in the SOT-23-6 package and use the same pin configuration, which allows them to share a common PCB land pattern. However, the electrical differences between the two parts must still be evaluated before any substitution.
Can the AP3032KTR-G1 and AP3033KTR-G1 be used interchangeably in an existing design?
They are not automatically interchangeable. Although the package and pinout are the same, the LED current rating and feedback reference voltage differ. A replacement is only valid after verifying that the target design's LED current, inductor, and feedback network are compatible with the selected variant per the manufacturer datasheet.
What input voltage range do the AP3032KTR-G1 and AP3033KTR-G1 support?
Both devices are low-voltage boost converters intended for operation from a single-cell Li-ion or similar low-voltage supply. The exact minimum and maximum input voltage limits, as well as the maximum output voltage, should be taken from the official Diodes Incorporated datasheet for each part number.
How is the LED current set on the AP3032KTR-G1 and AP3033KTR-G1?
The LED current is programmed by an external sense resistor connected to the feedback (FB) pin. Because the feedback reference voltage differs between the AP3032KTR-G1 and AP3033KTR-G1, the sense resistor value must be recalculated for each variant using the reference voltage specified in its datasheet.
What switching frequency do the AP3032KTR-G1 and AP3033KTR-G1 use?
Both are fixed-frequency boost converters. The exact switching frequency value should be confirmed from the Diodes Incorporated datasheet for each specific part number, as it affects inductor and output capacitor selection.
What protection features are included in the AP3032KTR-G1 and AP3033KTR-G1?
Both devices include open-LED and over-voltage protection to prevent damage when the LED string is disconnected or fails open. Refer to the respective Diodes Incorporated datasheets for the complete list of protection features and their exact thresholds.