1. General Operating Conditions

️· Supply Voltage (VBAT): 2.7V to 5.5V
️· Standby Supply Current (IVBAT - EN=0): 1.4 µA to 4 µA (with external 32kHz clock running or not)
️· Normal Mode Supply Current (External 32kHz clock running, outputs disabled): 0.16 mA to 0.22 mA
️· Power Save Mode Supply Current (External 32kHz clock running): 3.1 µA to 5 µA
️· Internal Oscillator Frequency Accuracy:
- -4% to +4% at 25°C
- -7% to +7%
️· Operating Temperature: -30°C to +85°C

2. Charge Pump Parameters

️· Charge Pump Output Resistance (ROUT): Varies depending on gain and VBAT voltage:
- Gain = 1.5, VBAT = 2.9V: 6 Ω
- Gain = 1, VBAT = 2.9V: 1 Ω
- Gain = 1.5, VBAT = 3.6V: 1.4 Ω
- Gain = 1, VBAT = 3.6V: 1 Ω
️· Switching Frequency (fSW): 1.2 MHz to 1.3 MHz
️· Ground Current (IGND): 1.2 mA to 2.5 mA
️· VCP Turn-On Time: 100 µs
️· Recommended Charge Pump Load Current: 0 mA to 100 mA

3. LED Driver Parameters

️· Leakage Current (ILEAK - PWM=0%): 0.1 µA to 1 µA (per LED output)
️· Maximum Source Current (IMAX): 25.5 mA (per LED output)
️· Output Current Accuracy (at 17.5mA, 25°C): -2.5% to +2.5%
️· Output Current Accuracy (at 17.5mA): -5% to +5%
️· Matching Accuracy (LED output current): 1% to 2.5%
️· LED Switching Frequency (fLED): 312 Hz
️· Saturation Voltage (VSAT - at 17.5mA): 45mV to 100mV

IMPORTANT NOTES & CAVEATS:

️· Typical vs. Minimum/Maximum: The datasheet excerpt emphasizes *minimum* and *maximum* values. "Typ" values are typical values and not guaranteed. Design should not rely solely on "Typ" values.
️· Conditions: *Read the conditions associated with each parameter.* The values are only valid *if* the specified conditions are met. Varying conditions (temperature, voltage, load) will alter the parameter values.
️· Gain: The charge pump output resistance (ROUT) is heavily dependent on the gain setting. Be certain to account for this when designing your circuit.
️· Application: This is an excerpt; it doesn't describe the entire functionality. Consult the full datasheet for complete details, application notes, and layout recommendations.
️· Footnotes: Pay very close attention to the footnotes in the original data sheet. They define the conditions and test setups used to obtain the given values.
️· Design margin: It's crucial to include sufficient design margin. The datasheet provides minimum and maximum values. Real-world performance can vary, so avoid operating close to these limits.