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LP5569 数据表(PDF) 6 Page - Texas Instruments |
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LP5569 数据表(HTML) 6 Page - Texas Instruments |
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6 / 93 page  6 LP5569 SNVSAP8A – JULY 2017 – REVISED SEPTEMBER 2017 www.ti.com Product Folder Links: LP5569 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated 7.5 Electrical Characteristics Unless otherwise noted, specifications apply to the LP5569 device in a circuit per the typical application diagram for the single device with VVIN = 3.6 V, V1P8 = 1.8 V, VEN/PWM = VVIN, CIN = COUT = CFLY1 = CFLY2 = 1 µF. Typical (TYP) values apply for TA = 25°C and minimum (MIN) and maximum (MAX) apply over the operating ambient temperature range ( −40°C < TA < 85°C). PARAMETER TEST CONDITIONS MIN TYP MAX UNIT IVIN Standby supply current VEN/PWM = 0 V, chip_en (bit) = 0 0.2 1 µA VEN/PWM = 3.3 V, chip_en (bit) = 0, external CLK not running 1 2 VEN/PWM = 3.3 V, chip_en (bit) = 0, external CLK running 2 4 Normal-mode supply current External CLK running, charge pump and current sinks disabled 56 70 µA Charge pump in 1× mode, no load, current sinks disabled 65 90 Charge pump in 1.5× mode, no load, current- sink outputs disabled 1.8 mA Power-save mode supply current External CLK running, see Automatic Power- Save Mode 10 15 µA Internal oscillator running 10 15 IV1P8 Standby supply current VEN/PWM = 0 V, chip_en(bit) = 0 0.2 1 µA VEN/PWM = 3.3 V, chip_en (bit) = 0, external CLK not running 0.2 2 µA VEN/PWM = 3.3 V, chip_en (bit) = 0, external CLK running 1 4 µA Normal-mode supply current External CLK running, charge pump and current sinks disabled 174 190 µA Charge pump in 1× mode, no load, current sinks disabled 174 190 µA Charge pump in 1.5× mode, no load, current- sink- outputs disabled 180 µA Powersave-mode supply current External CLK running 1 5 µA Internal oscillator running 1 5 µA ƒOSC 32-kHz internal oscillator frequency accuracy TA = 25°C –10% 10% 10-MHz internal oscillator frequency accuracy –7% 7% VUVLO Undervoltage lockout VVIN falling 2.2 V VVIN rising 2.3 7.6 Charge-Pump Electrical Characteristics PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ROUT Charge-pump output resistance Gain = 1×, VVIN = 4.2 V 1 Ω Gain = 1.5×, VVIN = 3.7 V 3.5 VOUT VVIN = 3.7 V, IOUT = 160 mA, gain = 1.5× 4.41 4.5 4.59 V ƒSW Switching frequency 1.25 MHz ICL Output current limit VOUT = 0 V, VVIN = 3.7 V, CP_CONFIG = 0xFF 600 mA tON VOUT turnon time IOUT = 0 mA, VIN ≥ 3 V, VOUT > 4.1 V, gain = 1.5× 100 µs IOUT Maximum output current VVIN > 3.1 V, VOUT dropped 10%, gain = 1.5× 200 mA VIN > 2.5 V, VOUT dropped 10%, gain = 1.5× 150 |
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