Datasheet LTC3026-1 (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | 1.5A Low Input Voltage VLDO Linear Regulator |
| 页数 / 页 | 16 / 1 — FEATURES. DESCRIPTION. Input Voltage Range: 1.14V to 5.5V. Low Dropout … |
| 文件格式/大小 | PDF / 181 Kb |
| 文件语言 | 英语 |
FEATURES. DESCRIPTION. Input Voltage Range: 1.14V to 5.5V. Low Dropout Voltage: 100mV at IOUT = 1.5A
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LTC3026-1 1.5A Low Input Voltage VLDO Linear Regulator
FEATURES DESCRIPTION
n
Input Voltage Range: 1.14V to 5.5V
The LTC®3026-1 is a very low dropout (VLDO™) linear n
Low Dropout Voltage: 100mV at IOUT = 1.5A
regulator that can operate at input voltages down to n
Adjustable Output Range: 0.4V to 2.6V
1.14V. The device is capable of supplying 1.5A of output n
Output Current: Up to 1.5A
current with a typical dropout voltage of only 100mV. n
Excellent Supply Rejection Even Near Dropout
Output current comes directly from the input supply to n Shutdown Disconnects Load from VIN and VBST maximize efficiency. n Low Operating Current: The LTC3026-1 is the same as the LTC3026 but has the IIN = 95μA at VIN = 1.5V boost converter internally disabled. With the boost con- IBIAS = 175μA at VBIAS = 5V verter disabled, the SW pin of the LTC3026 is replaced with n Low Shutdown Current: a ground pin and the BST pin is replaced with a BIAS pin IIN < 1μA (Typ), IBST = 0.1μA (Typ) that requires an external 5V supply for operation. n Stable with 10μF or Greater Ceramic Capacitors n Short-Circuit, Reverse Current Protected The LTC3026-1 regulator is stable with 10μF or greater n Overtemperature Protected ceramic output capacitors. The device has a low 0.4V n Available in 10-Lead MSOP and 10-Lead reference voltage which is used to program the output (3mm voltage via two external resistors. The device also has × 3mm) DFN Packages internal current limit, overtemperature shutdown, and
APPLICATIONS
reverse output current protection. The LTC3026-1 is avail- able in a small 10-lead MSOP or low profile (0.75mm) n High Efficiency Linear Regulator 10-lead 3mm × 3mm DFN package. n Post Regulator for Switching Supplies L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks n Microprocessor Supply and ThinSOT, VLDO are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION 1.2V Output Voltage from 1.5V Input Supply Dropout Voltage vs Output Current
150 LTC3026-1 BIAS VBIAS = 5V IN VIN = 1.5V 1μF 100 1μF 1.2V 0.4V + 1.5V – OUT V 2.0V OUT = 1.2V, 1.5A 2.6V DROPOUT (mV) 8.06k 50 ADJ COUT OFF ON SHDN 10μF GNDS 100k 4.02k GND PG 0 0 0.5 1.0 1.5 30261 TA01a IOUT (A) 30261 TA01b 30261f 1
FEATURES DESCRIPTION
n
Input Voltage Range: 1.14V to 5.5V
The LTC®3026-1 is a very low dropout (VLDO™) linear n
Low Dropout Voltage: 100mV at IOUT = 1.5A
regulator that can operate at input voltages down to n
Adjustable Output Range: 0.4V to 2.6V
1.14V. The device is capable of supplying 1.5A of output n
Output Current: Up to 1.5A
current with a typical dropout voltage of only 100mV. n
Excellent Supply Rejection Even Near Dropout
Output current comes directly from the input supply to n Shutdown Disconnects Load from VIN and VBST maximize efficiency. n Low Operating Current: The LTC3026-1 is the same as the LTC3026 but has the IIN = 95μA at VIN = 1.5V boost converter internally disabled. With the boost con- IBIAS = 175μA at VBIAS = 5V verter disabled, the SW pin of the LTC3026 is replaced with n Low Shutdown Current: a ground pin and the BST pin is replaced with a BIAS pin IIN < 1μA (Typ), IBST = 0.1μA (Typ) that requires an external 5V supply for operation. n Stable with 10μF or Greater Ceramic Capacitors n Short-Circuit, Reverse Current Protected The LTC3026-1 regulator is stable with 10μF or greater n Overtemperature Protected ceramic output capacitors. The device has a low 0.4V n Available in 10-Lead MSOP and 10-Lead reference voltage which is used to program the output (3mm voltage via two external resistors. The device also has × 3mm) DFN Packages internal current limit, overtemperature shutdown, and
APPLICATIONS
reverse output current protection. The LTC3026-1 is avail- able in a small 10-lead MSOP or low profile (0.75mm) n High Efficiency Linear Regulator 10-lead 3mm × 3mm DFN package. n Post Regulator for Switching Supplies L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks n Microprocessor Supply and ThinSOT, VLDO are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION 1.2V Output Voltage from 1.5V Input Supply Dropout Voltage vs Output Current
150 LTC3026-1 BIAS VBIAS = 5V IN VIN = 1.5V 1μF 100 1μF 1.2V 0.4V + 1.5V – OUT V 2.0V OUT = 1.2V, 1.5A 2.6V DROPOUT (mV) 8.06k 50 ADJ COUT OFF ON SHDN 10μF GNDS 100k 4.02k GND PG 0 0 0.5 1.0 1.5 30261 TA01a IOUT (A) 30261 TA01b 30261f 1