Features
- 1.8V to 20V Battery Input Voltage
- Automatic Disable when Display Logic is Shut Down
- Extremely Small QSOP Package
- 32-Level Internal DAC
- SMBus Serial Interface (MAX1621)
- Positive or Negative Output Voltage
Pin Configuration
Pin Description
| PIN | NAME | FUNCTION |
| MAX1621 | ||
| 1 | SDA | System Management Bus Serial-Data Input and Open-Drain Output |
| 2 | SCL | System Management Bus Serial-Clock Input |
| 3 | BATT | Battery Voltage-Sense Input |
| 4 | SUS* | System Management Bus Suspend-Mode Input (active-low) |
| 5 | POK | Power OK Voltage-Sense Input, 1V threshold |
| 6 | REF | Reference Voltage Output. Bypass REF with 0.1µF to AGND. |
| 7 | POL | Logic-Level Input. POL selects output voltage polarity: high = positive boost, low = negative boost. |
| 8 | LCDON* | Open-Drain Output. LCDON* controls LCD with external PNP. |
| 9 | FB | Feedback Voltage Input |
| 10 | DOUT | DAC Output Voltage |
| 11 | VDD | IC Input Supply, 3.0V to 5.5V |
| 12 | AGND | Analog Ground |
| 13 | PGND | Power Ground |
| 14 | LX | Switching-Voltage Sense Input |
| 15 | DLO | External Transistor Drive, Low |
| 16 | DHI | External Transistor Drive, High |
Specifications
| Product Attribute | Attribute Value |
| Product Category: | Power Management Specialised – PMIC |
| Series: | MAX1621 |
| Type: | Digital Power Management |
| Mounting Style: | SMD/SMT |
| Package/Case: | QSOP-16 |
| Input Voltage Range: | 1.8 V to 20 V |
| Output Voltage Range: | – 27 V to 27 V |
| Minimum Operating Temperature: | – 40 C |
| Maximum Operating Temperature: | + 85 C |
| Input Current: | 150 uA |
| Input Voltage, Max: | 20 V |
| Input Voltage, Min: | 1.8 V |
| Maximum Output Voltage: | 27 V |
| Pd – Power Dissipation: | 667 mW |
Applications
- Notebook Computers
- Palmtop Computers
- Personal Digital Assistants
- Portable Data-Collection Terminals
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