Description:The ISL91127 and ISL91127IR are high-current buck-boost switching regulators for systems using new battery chemistries. They use Renesas' proprietary buck-boost algorithm to maintain voltage regulation while providing excellent efficiency and very low output voltage ripple when the input voltage is close to the output voltage.They are capable of delivering at least 2A continuous output current (VOUT = 3.3V) over a battery voltage range of 2.5V to 4.35V. This maximizes the energy utilization of advanced sing
ADJUSTABLE VOUT=(1-5.2 VOLT); PFM TECHNIQUE ALSO USED
Analog IC - Other Type:
SWITCHING REGULATOR
Control Mode:
VOLTAGE-MODE
Control Technique:
PULSE WIDTH MODULATION
Input Voltage-Max:
5.5 V
Input Voltage-Min:
1.8 V
Input Voltage-Nom:
3.6 V
JESD-30 Code:
S-PQCC-N20
JESD-609 Code:
e3
Length:
4 mm
Moisture Sensitivity Level:
3
Number of Functions:
1
Number of Terminals:
20
Operating Temperature-Max:
85 °C
Operating Temperature-Min:
-40 °C
Output Current-Max:
5 A
Package Body Material:
PLASTIC/EPOXY
Package Code:
HVQCCN
Package Shape:
SQUARE
Package Style:
CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Cel):
260
Seated Height-Max:
1 mm
Surface Mount:
YES
Switcher Configuration:
BUCK-BOOST
Switching Frequency-Max:
2500 kHz
Temperature Grade:
INDUSTRIAL
Terminal Finish:
Matte Tin (Sn) - annealed
Terminal Form:
NO LEAD
Terminal Pitch:
0.5 mm
Terminal Position:
QUAD
Time@Peak Reflow Temperature-Max (s):
30
Width:
4 mm
ISL91127IRAZ-T Frequently Asked Questions (FAQs)
The maximum input voltage that can be applied to the ISL91127IRAZ-T is 5.5V, as specified in the datasheet. However, it's recommended to operate the device within the recommended input voltage range of 2.7V to 5.2V for optimal performance and reliability.
To ensure the ISL91127IRAZ-T is in a low-power state during shutdown, make sure to pull the EN pin low and ensure that the input voltage is below 1.2V. This will put the device in a low-power shutdown state, reducing quiescent current to less than 1μA.
To minimize EMI and noise, it's recommended to follow a good layout and placement practice for the ISL91127IRAZ-T. This includes keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing the length of the input and output traces. Additionally, it's recommended to use a shielded inductor and to keep the device away from noise-sensitive components.
The output voltage of the ISL91127IRAZ-T can be adjusted by using an external resistor divider network connected to the FB pin. The resistor values can be calculated using the formula provided in the datasheet, and the output voltage can be set to any value between 0.8V and 3.3V.
The thermal derating of the ISL91127IRAZ-T is specified in the datasheet, and it affects the device's performance by reducing the maximum output current and increasing the junction temperature. It's essential to ensure that the device is operated within the recommended temperature range and that proper thermal management is implemented to prevent overheating.
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ISL91127IRAZ-T Overview
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