View MIC2507_282430.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

MIC2507
Micrel
MIC2507
Quad Integrated High-Side Switch Not Recommended for New Designs
General Description
The MIC2507 is a quad integrated high-side power switch that consists of four protected N-channel MOSFET output pass transistors each with a dedicated TTL compatible input and charge pump. The MIC2507 can be used instead of separate high-side drivers and MOSFETs in many lowvoltage applications. The MIC2507 switches 2.7V to 7.5V and can deliver at least 1A continuous current from any individual output. A slow turn-on feature prevents high inrush current when switching capacitive loads. The internal control circuitry is powered from switch #1's supply input. The MIC2507 allows any output to be pulled higher than its input voltage while in the off state. A multipurpose open-drain fault flag output indicates overcurrent limiting, open-load detection, and thermal shutdown. Overcurrent limiting is internally fixed and requires no external components. Open-load detection is active only when the switch is off. Open-load detection requires one high-value resistor from the load to the supply. Thermal shutdown turns off the output if the die temperature exceeds approximately 135C. The switch automatically restarts when the temperature falls 10C. The MIC2507 is available in SOIC packages with a temperature range of -40C to +85C.
Features
2.7V to 7.5V supply Current limit Open-load detection Thermal shutdown Open-drain fault flag <1A off-state current Slow turn-on and fast turnoff 1ms typical rise time (load dependent) * Low MOSFET on-resistance 120m typical at 5V 130m typical at 3.3V * * * * * * *
Applications
* Battery Management * Power Management
Ordering Information
Part Number MIC2507BM Temperature Range -40C to +85C Package 14-lead SOIC
Typical Application
+2.7V to +7.5V MIC2507BN
1 2 3 4 5 6 7
IN1 OUT1 CTL1 GND CTL2 OUT2 IN2
IN4 OUT4 CTL4 FLG CTL3 OUT3 IN3
14 13 12 11 10 9 8
Load
ON Control OFF Input #1
Load
ON OFF Control Input #4
"Fault" LED
Control ON Input #2 OFF
ON Control OFF Input #3
Load
Load
Distributed-Load Power Switch
Micrel, Inc. * 1849 Fortune Drive * San Jose, CA 95131 * USA * tel + 1 (408) 944-0800 * fax + 1 (408) 944-0970 * http://www.micrel.com
August 1999
1
MIC2507
MIC2507
Micrel
Pin Configuration
MIC2507
IN1 OUT1 CTL1 GND CTL2 OUT2 IN2 1 2 3 4 5 6 7 14 IN4 13 OUT4 12 CTL4 11 FLG 10 CTL3 9 8 OUT3 IN3
14-Pin SOIC (M)
Pin Description
Pin Number 1 Pin Name IN1 Pin Function Supply #1 Input: Output MOSFET drain. Also is the supply input for the common oscillator, thermal shutdown, and flag circuitry. Must be powered to use switch #2, #3, or #4. Connect to supply for switch #1. Switch #1 Output: Output MOSFET source. Typically connect to switched side of load. Output can be pulled above input voltage in off mode. Control #1 (Input): Noninverting TTL compatible control input. Ground: Power return. Control #2 (Input): Same function as CTL1. Supply #2 Output: Output MOSFET source. Switch #2 Input: Output MOSFET drain. Also is supply voltage for respective channel control input and charge pump. Switch #3 Input: Same function as IN2. Supply #3 Output: Output MOSFET source. Control #3 (Input): Same function as CTL1. Fault Flag (Output): Active-low, open-drain output. If all CTLs are low, indicates open load. If any CTL is high, indicates current limit or thermal shutdown. Control #4 (Input): Same function as CTL1. Supply #4 Input: Output MOSFET source. Switch #4 Output: Same function as IN2.
2 3 4 5 6 7 8 9 10 11
OUT1 CTL1 GND CTL2 OUT2 IN2 IN3 OUT3 CTL3 FLAG
12 13 14
CTL4 OUT4 IN4
MIC2507
2
August 1999
MIC2507
Micrel
Absolute Maximum Ratings
Supply Voltage (VIN max) ................................................ 8V Output Current (IOUT max) ......................... Internally Limited Control Input (VCTLn min/max) .......................... -0.3V to 15V Fault Flag Voltage (VFLG max) ....................................... 40V Fault Flag Current (IFLG max) ...................................... 25mA Storage Temperature ............................... -65C to +150C Lead Temperature ..................................................... 260C Junction Temperature (TJ) ....................... Internally Limited
Operating Ratings
Supply Voltage (VIN) ................................... +2.7V to +7.5V Ambient Operating Temperature (TA) ........ -40C to +85C Thermal Resistance (JA)...................................... 120C/W
Electrical Characteristics
VIN = +5V; TA = 25C, bold values indicated -40C TA +85C; unless noted. Parameter Supply Current Condition CTL1-4 = logic 0; OUT = open CTL1 = logic 1; CTL2-4 = logic 0; OUT = open CTL1-4 = logic 1; OUT = open Control Input Threshold Voltages VCTLn rising VCTLn falling Control Input Current CTLn = logic 0 CTLn = logic 1 Control Input Capacitance Output MOSFET Resistance VIN = 5V VIN = 3.3V Output Leakage Output Turn-On Delay Time Output Turn-On Rise Time Output Turn-off Delay + Fall Time Current Limit Threshold Open Load Threshold Overtemperature Threshold CTLn = logic low, Note 1 TJ increasing TJ decreasing Error Flag Output Resistance VIN = 5V VIN = 3.3V Error Flag Saturation Voltage IL = 1mA RL = 10 each output RL = 10 each output RL = 10 each output 1 0.8 Min Typ 0.1 80 100 1.9 1.6 0.010 0.010 1 120 130 0.05 0.5 1.6 1.0 2 1.1 135 125 160 240 160 300 500 300 1.6 180 240 200 260 10 1.5 5.0 10 1 1 Max 10 160 180 2.4 Units A A A V V A A pF m m m m A ms ms s A V C C mV
General Note: Devices are ESD protected; however, handling precautions are recommended. Note 1: Open load threshold is the OUT voltage where FLG becomes active (low). OUT driven externally.
August 1999
3
MIC2507
MIC2507
Micrel
Typical Characteristics
Turn-On Characteristics
6 CONTROL
ON-RESISTANCE (m)
On-Resistance vs. Supply Voltage
175 ON-RESISTANCE (m) 200 160
On-Resistance vs. Temperature
4 2 0 6 -2 R = 10
L
150
VIN = 3.3V 120 80 40 RL = 10 VIN = 5.0V
OUTPUT
4 2 0 -2 -0.5
125 R = 10
L
100
0
0.5 1.0 1.5 2.0 2.5 3.0 TIME (ms)
0
2 4 6 SUPPLY VOLTAGE (V)
8
0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
Turn-Off Characteristics
CONTROL (V) 6
SUPPLY CURRENT (A)
On-State Supply Current vs. Supply Voltage
200 SUPPLY CURRENT (nA) 160 ALL OUTPUTS ON 120 80 40 0 1 OUTPUT ON 240
Off-State Supply Current vs. Supply Voltage
200 ALL OUTPUTS OFF 160 120 80 40 0 0 2 4 6 SUPPLY VOLTAGE (V) 8
4 2 0 -2 6
RL = 10
OUTPUT (V)
4 2 0 -2 -4 -2 0 2 TIME (s) 4 6
0
2 4 6 SUPPLY VOLTAGE (V)
8
Control Input Threshold vs. Supply Voltage
2.5 CONTROL THRESHOLD (V) 2.0 1.5 CTL FALLING 1.0 0.5 0 SUPPLY CURRENT (A) CTL RISING 160
On-State Supply Current vs. Temperature
SUPPLY CURRENT (nA)
Off-State Supply Current vs. Temperature
600 500 400 300 200 100 0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C) ALL OUTPUTS OFF
120
ALL OUTPUTS ON
80 1 OUTPUT ON 40
0
2 4 6 SUPPLY VOLTAGE (V)
8
0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
Control Input Threshold vs. Temperature
2.5 CONTROL THRESHOLD (V) 2.0 1.5 CTL FALLING 1.0 0.5 0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C) CTL RISING TIME (ms) 2.0
Delay and Rise Times vs. Temperature
400 ON-RESISTANCE () VIN = 5.0V 1.5
Flag On-Resistance vs. Temperature
300
V
IN
= 3.3V
1.0
RISE
200 VIN = 5.0V
0.5 DELAY 0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
100
0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
MIC2507
4
August 1999
MIC2507
Micrel
Typical Characteristics
Open-Load Threshold Voltage vs. Supply Voltage
1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0 2 4 6 SUPPLY VOLTAGE (V) 8 OPEN-LOAD THRESHOLD (V) OPEN-LOAD THRESHOLD (V)
Open-Load Threshold Voltage vs. Temperature
1.5 CURRENT LIMIT (A) 2.5
Current Limit vs. Temperature
VIN = 3.3V 2.0 V = 5.0V IN
1.0
0.5
1.5
0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
1.0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
August 1999
5
MIC2507
MIC2507
Micrel
Block Diagram
VIN1/2 IN1 0.01 metal CURRENT LIMIT GATE CONTROL OUT1 IN2 CURRENT LIMIT Load 1 VIN4 IN4 CURRENT LIMIT
Optional Resistor for Open-Load Detect
OSC.
THERMAL SHUTDOWN
CHARGE PUMP CTL1
OPEN LOAD DETECT
CHARGE PUMP CTL2 GATE CONTROL
OPEN LOAD DETECT
OUT2 IN3 CURRENT LIMIT Load 2
CHARGE PUMP CTL3 GATE CONTROL
OPEN LOAD DETECT
OUT3
CHARGE PUMP CTL4 GATE CONTROL
OPEN LOAD DETECT
OUT4 Load 4 FLAG
MIC2507
MIC2507
6
August 1999
MIC2507
Micrel
Thermal Shutdown Thermal shutdown shuts off all output MOSFETs and signals the fault flag if the die temperature exceeds approximately 135C. 10C of hysteresis prevents the switch from turning on until the die temperature drops to approximately 125C. Thermal shutdown is indicated by the fault flag only when CTL is high (MOSFET on). Overcurrent Limit The overcurrent limit level is preset internally. The preset level prevents damage to the output MOSFET but allows a minimum current of 1A through the output MOSFET. Output current is monitored across an internal shunt resistor. Overcurrent detection functions only when CTL is logic high (output is on). Open-Load Detection Open-load detection indicates the absence of an output load by signaling the fault flag. Open-load detection is optional and is enabled by connecting a high-value pull-up resistor between IN and OUT. If there is no load, the circuit detects a high OUT voltage and signals the fault flag. Under normal conditions, the low resistance of a typical load pulls OUT low. Open-load detection functions only when CTL is low (output is off). Fault Flag FLG (fault flag) is an N-channel open-drain MOSFET output. The fault-flag MOSFET is active (low) for one or more of the following conditions on any one or more outputs: open load, current limit, or thermal shutdown.
Functional Description
The MIC2507 is a noninverting device. A TTL high applied to a CTL (control) input turns on the respective output transistor. A TTL low turns off the output transistor. Overcurrent and overtemperature fault conditions inhibit MOSFET turn on. Supply Inputs IN1 (supply input #1) is the supply side of switch #1 but also powers the common oscillator, thermal shutdown, and flag. Power must be applied to IN1 to use switch #2, #3, or #4. IN1 powers the charge pump for switch #1. IN2, IN3, and IN4 are the supplies for switches #2, #3, and #4, respectively. Each supply input powers its respective charge pump and control input circuitry. Control Input Applying a TTL high signal to any CTL input activates the oscillator and the CTL input's respective charge pump and gate control circuit. If there are no fault conditions, the output MOSFET turns ON. Oscillator/Charge Pump The oscillator produces a 100kHz square wave output which drives each charge pump. The oscillator is disabled when all CTL inputs are low or die temperature is greater than 135C. Each charge pump is a voltage quintupler (5x). Its output voltage is clamped to prevent the output switch gate oxide damage. The charge pump capacitors are self contained. Gate Control Each gate control circuit charges the output MOSFET's gate from its charge pump or discharges the MOSFET gate to ground as determined by the control input and thermal shutdown.
August 1999
7
MIC2507
MIC2507
Micrel
Package Information
PIN 1
0.154 (3.90)
DIMENSIONS: INCHES (MM)
0.026 (0.65) MAX)
0.050 (1.27) 0.016 (0.40) TYP TYP 0.006 (0.15)
0.193 (4.90) 45 3-6 0.244 (6.20) 0.228 (5.80)
0.057 (1.45) 0.049 (1.25)
0.344 (8.75) 0.337 (8.55)
SEATING PLANE
14-Lead SOIC (M)
MIC2507
8
August 1999

▲Up To Search▲

Price & Availability of MIC2507

	To Download MIC2507 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .