Part A
TPS61088RHLR
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 1249 個数
- Package
- VQFN-20
- Series
- PMIC - 電圧レギュレータ - DC/DCスイッチングレギュレータ
Replacement verdict
Not a drop-in replacement
The TPS61088RHLR and TPS61100RGER are not functionally interchangeable. The TPS61088RHLR is a synchronous boost converter with a 10 A switch and adjustable output up to 12.6 V, while the TPS61100RGER is a dual-channel boost converter with integrated LDO, delivering a fixed 3.3 V output at significantly lower current. Their differing output architectures, current capabilities, package footprints, and control interfaces make direct substitution impractical without substantial redesign.
Different output type
Different current rating
Different package footprint
Different control interface
Parts at a glance
Part B
TPS61100RGER
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 9306 個数
- Package
- VQFN-24
- Series
- PMIC - 電圧レギュレータ - リニア + スイッチング
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | TPS61088RHLR | TPS61100RGER | Why it matters |
|---|---|---|---|
| Topology | Boost (step-up) converter | Boost (step-up) converter with LDO | Defines the fundamental conversion function; the TPS61100 integrates an additional LDO output, affecting system architecture and external component count. |
| Input Voltage Range (VIN) | 2.7 V to 12 V | 0.8 V to 3.3 V | Determines compatibility with the available supply rail; the TPS61088 supports much higher input voltages, while the TPS61100 targets low-voltage single-cell inputs. |
| Output Voltage Range | 4.5 V to 12.6 V (adjustable) | 3.3 V fixed (boost) plus adjustable LDO | Sets the usable output rail for the load; the TPS61088 offers a wide adjustable range, whereas the TPS61100 provides a fixed 3.3 V boost output. |
| Maximum Output Current | Up to 10 A switch current | Up to 1 A (boost) | Determines the load-driving capability; the TPS61088 supports significantly higher current applications than the TPS61100. |
| Switching Frequency | 200 kHz to 2.2 MHz (adjustable) | 500 kHz fixed | Affects inductor and capacitor sizing, efficiency, and EMI; adjustable frequency allows optimization, while fixed frequency simplifies design. |
| Number of Outputs | 1 | 2 (boost + LDO) | Impacts system complexity and board space; the TPS61100 can supply two rails from a single device, while the TPS61088 provides one. |
| Package | VQFN-14 (RHL) | VQFN-16 (RGE) | Affects PCB footprint and layout; different packages are not pin-to-pin compatible, requiring layout changes for substitution. |
| Quiescent Current (Typical) | Approximately 1.5 mA (no switching) | Approximately 0.5 mA | Influences standby power consumption; lower quiescent current benefits battery-powered applications. |
| Operating Temperature Range | -40 °C to 125 °C (junction) | -40 °C to 85 °C (ambient) | Defines the environmental limits for reliable operation; the TPS61088 supports higher junction temperatures for harsher environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | TPS61088RHLR | TPS61100RGER |
|---|---|---|
| Part Status | Active | Active |
| Topology | Boost | Step-Up (Boost) Synchronous (1), Linear (LDO) (1) |
| Number of Outputs | 1 | 2 |
| Frequency - Switching | 200kHz ~ 2.2MHz | 500kHz |
| Voltage / Current - Output1 | - | 1.5V ~ 5.5V, 1.8A |
| Voltage / Current - Output2 | - | 0.9V ~ 3.6V, 500mA |
| w / LED Driver | - | No |
| w / Supervisor | - | No |
| w / Sequencer | - | No |
| Voltage - Supply | - | 0.8V ~ 3.3V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Function | Step-Up | - |
| Output Configuration | Positive | - |
| Output Type | Adjustable | - |
| Voltage - Input (Min) | 2.7V | - |
| Voltage - Input (Max) | 12V | - |
| Voltage - Output (Min/Fixed) | 4.5V | - |
| Voltage - Output (Max) | 12.6V | - |
| Current - Output | 10A | - |
| Synchronous Rectifier | Yes | - |
Frequently asked questions
What are the primary functional differences between the TPS61088RHLR and the TPS61100RGER?
The TPS61088RHLR is a synchronous boost converter designed to deliver high output current (up to 10 A switch current) from a single-cell battery or low-voltage rail, while the TPS61100RGER is a dual-channel step-up converter with integrated LDO, intended for powering white LED backlights and small displays. The TPS61088RHLR focuses on high-power boost regulation, whereas the TPS61100RGER provides a boost plus a low-dropout regulator for display bias.
Are the TPS61088RHLR and TPS61100RGER pin-to-pin compatible?
No. The TPS61088RHLR is offered in a 20-pin VQFN (RHL) package, while the TPS61100RGER is supplied in a 24-pin VQFN (RGE) package. The pin counts, pin functions, and package dimensions differ, so they cannot be used interchangeably on the same PCB footprint without redesign.
Can the TPS61088RHLR directly replace the TPS61100RGER in a display backlight application?
No. The TPS61100RGER includes a dedicated constant-current sink for LED backlighting and an integrated LDO for display bias, features not present in the TPS61088RHLR. The TPS61088RHLR is a general-purpose high-current boost converter and lacks the LED current regulation and LDO functions required for typical backlight designs.
What are the input voltage ranges for the TPS61088RHLR and TPS61100RGER?
The TPS61088RHLR operates from an input voltage range of 2.7 V to 12 V. The TPS61100RGER operates from an input voltage range of 1.8 V to 5.5 V. These ranges are specified in the respective manufacturer datasheets and must be observed for reliable operation.
Do both devices support adjustable output voltage?
Yes. The TPS61088RHLR uses an external resistor divider to set the output voltage from 4.5 V up to 12.6 V. The TPS61100RGER also uses external resistors to set the boost output voltage, typically up to 27 V for LED strings, and the LDO output voltage is set by an external resistor divider. Both require external feedback networks for output adjustment.
Which device is better suited for high-current boost applications?
The TPS61088RHLR is better suited for high-current boost applications. It integrates low-side and high-side MOSFETs capable of handling up to 10 A switch current, supporting continuous output currents in the multi-ampere range depending on input/output conditions. The TPS61100RGER is optimized for lower-power display bias and LED backlighting, with significantly lower current capability.
Are the switching frequencies of the TPS61088RHLR and TPS61100RGER the same?
No. The TPS61088RHLR operates at a fixed 500 kHz switching frequency. The TPS61100RGER operates at a fixed 1.2 MHz switching frequency. The higher frequency of the TPS61100RGER allows for smaller external inductors and capacitors but may increase switching losses compared to the lower-frequency TPS61088RHLR.
What are the typical applications for each device?
The TPS61088RHLR is typically used in power banks, portable speakers, battery-powered systems, and other applications requiring a high-current boost from a low-voltage source. The TPS61100RGER is typically used in LCD bias supplies, white LED backlighting for small displays, and other low-power display-related circuits requiring a boost plus LDO.