MIC2045-2BTS Micrel Inc, MIC2045-2BTS Datasheet
![IC DISTRIBUTION SW SGL 16-TSSOP](/photos/6/50/65092/576-16-tssop_sml.jpg)
MIC2045-2BTS
Specifications of MIC2045-2BTS
Related parts for MIC2045-2BTS
MIC2045-2BTS Summary of contents
Page 1
... Additionally, for tighter control over inrush current during start up, the output slew-rate may be adjusted by an external capacitor. The MIC2045 features a auto-reset circuit breaker that latches the output OFF upon detecting an overcurrent condition lasting more than 32ms. The output is reset by removing or reducing the load. ...
Page 2
... MIC2044/2045 Ordering Information Part Number Standard Pb-Free MIC2044-1BTS MIC2044-1YTS MIC2044-2BTS MIC2044-2YTS MIC2045-1BTS MIC2045-1YTS MIC2045-2BTS MIC2045-2YTS Pin Configuration MIC2044/2045 Enable Circuit Breaker Active-High Active-Low Active-High X Active-Low X PWRGD 1 16 VIN PGREF /FAULT 3 14 VOUT SLEW 4 13 VIN UVLOIN 5 12 VOUT ILIM 6 11 VIN ...
Page 3
MIC2044/2045 Pin Description Pin Number Pin Name 1 PWRGD /FAULT 10 GND 4 SLEW 6 ILIM 5 UVLOIN 7,11,13,16 VIN 9,12,14 VOUT 8 VBIAS 15 PGREF January 2005 Pin Function Power-Good (Output): Open drain N-Channel device, active ...
Page 4
... IN BIAS I = 500mA OUT Output off V = 3V, 5V, 0.5V ≤ OUT 1A ≤ I ≤ 6A OUT 1.6V to 5.5V IN BIAS V = 0. rising (MIC2045) OUT Output latched off (MIC2045) I (/FAULT) = 15mA OL I (PWRGD) = 5mA FAULT PWRGD V rising IN V falling IN V rising IN V falling IN T increasing ...
Page 5
... IN BIAS R = 10Ω 1µF LOAD LOAD R = 10Ω 1µF LOAD LOAD R = 10Ω 1µF LOAD LOAD R = 10Ω 1µF LOAD LOAD > 4.0V for MIC2044/MIC2045 – CLF/R . LIM SET 50 10% (a) MIC2044/45-1 50 10% (b) MIC2044/45-2 Figure 1. Turn-On/Turn-Off Delay Increase the load 0.2V I LIMIT t FLAG ...
Page 6
MIC2044/2045 Test Circuit 10µF R3 75kΩ R4 68kΩ *R and C SET (See specific response plots) MIC2044/2045 C1 0.1µF C2 MIC2044/45-xBTS 0.1µF 8 VBIAS VOUT R1 20kΩ 7, 11, 13, 16 VIN PGREF R2 2 ...
Page 7
MIC2044/2045 Typical Characteristics Supply Current vs. Temperature 300 275 5.5V 250 IN BIAS 225 BIAS 200 175 150 1.6V 125 IN BIAS 100 -40 -20 0 ...
Page 8
... SET 8 5V Turn-Off 5.0V IN BIAS R = 1.65V LOAD LOAD 100 SET m TIME (500 s/div.) Latched Output Reset MIC2045 4.82V 5.0V IN BIAS R toggles from 2Ω to OPEN LOAD C = 47µF LOAD R = 220Ω SET TIME (50ms/div.) UVLO Response 1.45V V ramps 5Ω LOAD C = 47µ ...
Page 9
MIC2044/2045 Functional Characteristics (continued) Output Slew Response TIME (2.5ms/div.) January 2005 5Ω LOAD C = 47µF LOAD C = 0.033µF SLEW R = 220Ω SET 9 Thermal Shutdown Response 5.0V IN ...
Page 10
... SLEW Input 2 EN Logic OSC MIC2044/45 MIC2044/2045 V = 230mV REF Bandgap Reference Thermal Shutdown + Gate UVLO Control + Charge Pump Power-On Latch Reset (MIC2045 VBIAS 7,11,13,16 Power-Off VIN Reset 9,12,14 VOUT Replica Amp + Current Limit I 6 ILIM LIM + Delay (32ms) Open Load Detect ...
Page 11
... MIC2044/2045 Functional Description The MIC2044 and MIC2045 are high-side N-Channel switches equipped with programmable current limit for use in general purpose power distribution applications. The switches, available with active-high or active-low enable inputs, provide output slew-rate control and circuit protection via thermal shutdown and an optional output latch during overcurrent conditions ...
Page 12
... MOSFET being shut off. Circuit Breaker Function (MIC2045) The MIC2045 is designed to shut off all power to the load when a fault condition occurs, just as a circuit breaker would do. In this case, a fault condition is deemed to be anytime the output current exceeds the current limit for more than the flag delay period, nominally 32ms ...
Page 13
... VOUT) differential voltage and concludes a fault condition is present if the differential voltage exceeds 200mV for more than the flag delay period. For the MIC2045, the /FAULT will assert and the output will latch off if the output is not within 200mV of the input before the flag delay times out. ...
Page 14
... This same feature also can be used for soft-start requirements. PCB Layout Recommendations The MIC2044 and MIC2045 have very low on-resistance, typically 20mΩ, and the switches can provide continuous output current. Under heavy loads, the switched current may cause the devices to heat up considerably ...
Page 15
MIC2044/2045 Package Information MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel ...