R5550K NISSHINBO | Alldatasheet
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Technical content
Pch Load Switch IC with Current Sense and Voltage Sense NO.EA-292-201202 OUTLINE The R5550K Series are CMOS-based load switch ICs. Pch Tr. is us ed to achieve low On resistance (TYP.180mΩ) and low supply current (TYP. 2.6µA at no-load operation). Internally, a single IC consists of a voltage reference unit, an error amplifier, resistors for setting outpu t voltage and a current limit circuit. Output voltage is fixed inside the IC with high accuracy. The R5550K is suitable for monitoring abnormal current which may flow from lithium ion battery (one cell) to power lines connected to each load. If the abnormal current is detected, the switch turns off after a certain period of time (Dead-time). If overcurrent is detected, switch turns off after dead-time of 10ms. If the output current exceeds the output current limit, the output current limit circuit immediately controls the output current after the short current response time of 4µs. Then, switch turns off after dead-time of 1.33ms. The R5550K also includes a voltage sense pin which monitors abnormal voltage. If abnormal voltage is detected, switch turns off after dead-time of 10ms. As protection circuits, the R5550K contains an output current limit circuit, a short-current protection circuit, and an undervoltage lockout (UVLO) circuit. The R5550K is available in a DFN(PL)1010-4F package which enables the high-density mounting.
FEATURES
- A single built-in Pch MOSFET
- Input Voltage Range ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ 2.3V to 5.25V
- Supply Current (IOUT=0mA) ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏTYP. 2.6µA
- Switch On Resistance ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏTYP. 180mΩ (VIN=3.3V)
- Output Current ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ MIN. 1000mA
- Package ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏDFN(PL)1010-4F
- Current Limit Threshold ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ MIN. 300mA
- Output Current Lim it ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ MIN. 1000mA
- Switching Operation (After turn-off) ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ Automatic Recovery Type
APPLICATIONS
Load Switch for portable communication equipments
NO.EA-292-201202 BLOCK DIAGRAMS R5550K001A Timer Gate control VOUT GND VIN VSENSE VREF VIDET VILIM Current Sense UVLO Timer
Protection Delay Time: Refer to Table 1 below. Table 1. Protection Delay Time me, OFF-time and ON-time, refer to Theory of Operation.
NO.EA-292-201202 PIN DESCRIPTION DFN(PL)1010-4F Top View Bottom View R5550K001A Pin No. Symbol Description
1 GND Ground Pin
2 VSENSE Voltage SENSE Pin
3 VIN Input Pin
4 VOUT Output Pin
NO.EA-292-201202 ABSOLUTE MAXIMUM RATINGS Symbol Item Rating Unit VIN Input Voltage -0.3 to 6.0 V VSENSE SENSE Pin Voltage -0.3 to 6.0 V VOUT Output Voltage -0.3 to VIN + 0.3 V IOUT Output Current 1000 mA PD Power Dissipation (Standard Land Pattern) *1 300 mW Ta Operating Temperature Range -40 to +85 ºC Tstg Storage Temperature Range -55 to +125 ºC *1 For more information about Power Dissipation and Standard Land Pattern, please refer to POWER DISSIPATION. ABSOLUTE MAXIMUM RATINGS Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the lifetime and safety for both device and system using the device in the field. The functional operation at or over t hese absolute maximum ratings is not assured. RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS) All of electronic equipment shou ld be designed that the mounted semiconductor devices operate within the recommended operating conditions. The semiconductor devices cannot operate normally over the recommended operating conditions, even if whe n they are used over such cond itions by momentary electr onic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions.
NO.EA-292-201202
ELECTRICAL CHARACTERISTICS
VIN=3.7V, IOUT=1mA, CIN=0.1µF, COUT=none, unless otherwise noted. The specifications surrounded by a r e g u a r a n teed by Design Engineering at - 40ºC ≤ Ta ≤ 85ºC. R5550K001A (Ta=25ºC) Symbol Item Conditions Min. Typ. Max. Unit VIN Input Voltage 2.3 5 . 2 5 V RON Switch On Resistance I OUT=100mA*1, VIN=3.3V 180 mΩ IOUT Output Current 1000 m A ISS Supply Current IOUT=0mA, VSENSE=2.0V 2.6 15 A IDET Current Limit Threshold *3 300 460 624 mA ILIM Output Current Limit *3 Initial Saturation Region*4 1130 1470 1790 mA ISC Short Current Limit VOUT=0V 300 mA VDET SENSE Pin Detector Threshold V SENSE falling x 0.97 0.5 x 1.03 V VHYS SENSE Pin Hysteresis V SENSE rising 0.63 0.9 1.2 V TDET1 Dead-time 1 VSENSE ≤ VDET or IDET ≤ IOUT < ILIM x 0.72 10 x 1.32 ms TOFF1 OFF-time 1 x 0.71 80 x 1.34 ms TON1 ON-time 1 x 0.72 2.5 x 1.35 ms TDET2 Dead-time 2 VOUT=0V or IOUT > ILIM x 0.65 1.33 x 1.35 ms TOFF2 OFF-time 2 x 0.65 80 x 1.35 ms TON2 ON-time 2 x 0.65 1.33 x 1.35 ms Tr Start-up Time VOUT=10% to 90%, COUT=0.1μF 12 s Trdelay Start-up Delay Time “VIN=VUVLO” to ”VOUT=10%” 60 s TSC Short Current Response Time *2 V OUT=0V 4 s VUVLO UVLO Release Voltage V IN rising 2.0 2.1 2.2 V VHYSUV UVLO Hysteresis VIN falling 0.2 V All test items listed under ELECTRICAL CHARACTERISTICS are done under the pulse load condition (Tj≈Ta=25ºC) except Start-up Time, Start-up Delay Time, Short Current Response Time, Dead-time 2, OFF-time 2 and ON-time 2. *1 As for RON when IOUT>100mA, refer to 12) Switch ON Resistance vs. Output Current of TYPICAL CHARACTERISTICS. *2 Refer to 36) Short-Protection-Circuit Transient Response of TYPICAL CHARACTERISTICS. *3 Each set value should be ”Max. IDET < Min. ILIM”. Note: Do not use with IDET=400mA and ILIM=500mA. *4 ILIM could be influenced by the measurement time. All products were tested within the initial saturation region as shown in the following page.
NO.EA-292-201202 R5550Kxxxx 1300 1400 1500 1600 1700 0 200 400 600 800 1000 Measure Time [us] Output Current Limit ILIM [mA] ILIM_SET = 1000mA Ta = 25°C Initial Saturation Region R5550KxxxA Measurement Board Information ・Board Size: 27.5mm x 40.0mm ・IC Mounting Position: Center of the board ・Board Material: Glass Cloth Epoxy Plastic (Single layer) ・Board Thickness: 1.6mm ・Diameter of Through-hole: 1.0mm ・Number of Through-holes: 12
NO.EA-292-201202 THEORY OF OPERATION Operation Example: R5550K001A with Automatic Recovery Protection and Voltage SENSE Pin [1] Operation of Current Limit Detector Threshold (IDET) If IOUT exceeds IDET, Timer 1 starts to operate and the switch turns off after Dead-time 1. After OFF-time 1, the switch automatically turns on. If I OUT≥IDET continues, the switch turns off again after ON-time 1. Afterwa rds, the switch repeats intermittent operation. If I OUT<IDET, the IC recognizes it as back in normal operation and start to outptut as usual. Even if IOUT<IDET during OFF-time1, the switch automatically turns on after OFF-time 1. IOUT VOUT 0.6A IDET ILIM Dead-time 1 OFF-time 1 ON-time1 Load Release OFF-time 1 ON-time 1 [2] Operation of Output Current Limit (I LIM) If IOUT exceeds I LIM (including output short-circuit), I OUT becomes limited by I LIM or I SC. So, Timer 2 starts to operate and the switch turns off after Dead-time 2. After OFF-time 2, the switch automatically turns on. If IOUT≥ILIM or short current condition continues, the switch turns off again after ON-time 2. Afterwards, I OUT the switch repeats intermittent operation. If I OUT<ILIM, the IC recognizes it as back in normal operation and start to outptut as usual. Even if IOUT<ILIM during OFF-time2, the switch automatically turns on after OFF-time 2. ＩOUT 2.0A Load VOUT Short Current Response Time TSC 1.35A Load Release 1.35A Dead-time 2 OFF-time 2 ON-time 2 OFF-time 2 IDET ILIM
NO.EA-292-201202 [3] Operation of SENSE Pin Voltage (V SENSE) If VSENSE falls below VDET, Timer 1 starts to operate and the switch turns off after Dead -time 1. After OFF-time 1, the switch automatically turns on. If V SENSE≤VDET continues, the switch turns off again after ON-time 1. Afterwards, IOUT repeats intermittent operation. If VSENSE>(VDET+VHYS), when the switch is automatically turning on after OFF-time 1, the IC recognizes it as back in normal operation and start to outptut as usual. Even if VSENSE>(VDET+VHYS) during OFF-time 1, the switch automatically turns on after OFF-time 1. VSENSE=Detecting VSENSE VOUT VSENSE=Releasing VDET OFF-time 1 OFF-time 1ON-time 1 ON-time 1 OFF-time 1 Dead-time 1
NO.EA-292-201202 TYPICAL APPLICATIONS AND TECHNICAL NOTES Typical Application Battery R5550K xxxA VIN VOUT GND(Pin2) CIN=0.1μF COUT ROUT Load Circuit Technical Notes The R5550K does not require any bypass capacitor between VIN and GND. However, it is recommended that a 0.1µF or more capacitor be connected between V IN and GND. Especially, if there’s any possibility of generating spike noise due to the parasitic element (inductance) of V IN, connect a proper size capacitor between V IN and G N D .
NO.EA-292-201202 500 400 300 200 100 Power Dissipation PD (mW) 0 25 5 0 7 5 85 100 125 150 Ambient Temperature (C) Power Dissipation On Board POWER DISSIPATION (DFN(PL)1010-4F ) Power Dissipation (P D) depends on conditions of mounting on board. This specification is based on the measurement conditions below. Measurement Conditions Standard Land Pattern Environment Mounting on Board (Wind Velocity=0m/s) Board Material Glass Cloth Epoxy Plastic (Double-sided) Board Dimensions 40mm x 40mm x 1.6mm Copper Ratio Topside: Appr ox. 50%, Backside: Approx. 50% Through-holes 0.54mm x 24pcs M e a s u r e m e n t R e s u l t : (Ta=25C, Tjmax=125C) Standard Land Pattern Power Dissipation 300mW Thermal Resistance jc = 48 C/W M easurement Board Pattern I C M o u n t A r e a ( U n it : mm)
NO.EA-292-201202 TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current R5550K001A R5550K001A R5550K001A
NO.EA-292-201202 2) Current Limit vs. Temperature 3) Current Limit vs. Input V oltage R5550K001A R5550K001A 4 ) O u t p u t C u r r e n t D e t e c t o r T h r e s h o l d 5 ) O u t p u t C u r r e n t D etector Threshold v s . T e m p e r a t u r e v s . I n p u t V o l t a ge R5550K001A R5550K001A
NO.EA-292-201202 6 ) S h o r t C u r r e n t L i m i t v s . T e m p e r a t u r e 7 ) S h o r t C u r r e n t Limit vs. Input Voltage R5550K001A R5550K001A 8) Supply Current Limit vs. Input Voltage 9 ) S upply Current vs. Input Voltage R5550K001A R5550K001A 10) Switch ON Resistance vs. Temperature 11) Switch ON Resistance vs. Input Voltage R5550K001A R5550K001A
NO.EA-292-201202 12) Switch ON Resistance vs. Output Current R5550K001A R5550K001A R5550K001A
NO.EA-292-201202 13) Inrush Current vs. Output Capacitor (CIN=NONE) R5550K001A 14) Inrush Current vs. Output Capacitor (CIN=NONE, COUT=1µF) R5550K001A
NO.EA-292-201202 15) Output Rise Time vs. Input Voltage 1 6 ) O u t p u t D e l a y T i m e v s . I n p u t V o l t a g e R5550K001A R5550K001A 17) Output Rise Time + Output Delay Time 18) V SENSE Detector Threshold vs. Temperature vs. Input Voltage R5550K001A R5550K001A 19) VSENSE Released Voltage vs. Temperature 20) V SENSE Hysterisis vs. Temperature R5550K001A R5550K001A
NO.EA-292-201202 21) VSENSE Detector Threshold vs. Input Voltage 22) VSENSE Released Voltage vs. Input Voltage R5550K001A R5550K001A 23) VSENSE Hysterisis vs. Input Voltage 24) UVLO Released Voltage vs. Temperature R5550K001A R5550K001A 25) UVLO Hysterisis vs. Temperature 26) Supply Current at UVLO Detected vs. Temperature R5550K001A R5550K001A
NO.EA-292-201202 27) Limit Ignoring Time1 vs. Temperature 2 8 ) L i m i t Ignoring Time1 vs. Input Voltage R5550K001A R5550K001A 29) Limit Ignoring Time 2 vs. Temperature 30) Limit Ignoring Ti me2 vs. Input Voltage R5550K001A R5550K001A 31) OFF Time1 vs. Temperature 32) ON Time1 vs. Temperature R5550K001A R5550K001A
NO.EA-292-201202 33) OFF Time2 vs. Temperature 34) ON Time2 vs. Temperature R5550K001A R5550K001A 35) Operation Waveform with SENSE Pin R5550K001A TDET1_SET = 10ms TOFF1_SET = 80ms TON1_SET = 2.5ms
NO.EA-292-201202 36) Short-Protection-Circuit Transient Response R5550K001A
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