ISL68200 Datasheet, PDF (5/32 Pages) Intersil Corporation – Single-Phase R4 Digital Hybrid PWM Controller with Integrated Driver

Pin Configuration
ISL68200
ISL68200
(24 LD 4x4 QFN)
TOP VIEW
24 23 22 21 20 19
EN 1
18 PROG1
VIN 2
17 PROG2
7VLDO 3
VCC ₄
25
GND PAD
16 ^PROG3
15 PROG4
SCL 5
14 IOUT
SALERT 6
13 NTC
7 8 9 10 11 12
Functional Pin Descriptions
PIN NUMBER SYMBOL
DESCRIPTION
1
EN Precision Enable input. Pulling EN above the rising threshold voltage initiates the soft-start sequence, while pulling EN below the
failing threshold voltage suspends the Voltage Regulator (VR) operation.
2
VIN Input voltage pin for R4™ loop and LDOs (5V and 7V). Place a high quality low ESR ceramic capacitor (1.0μF, X7R) in close
proximity to the pin. External series resistor is not advised.
3
7VLDO 7V LDO from VIN is used to bias current sensing amplifier. Place a high quality low ESR ceramic capacitor (1.0μF, X7R, 10V+)
in close proximity to the pin.
4
VCC Logic bias supply that should be connected to PVCC rail externally. Place a high quality low ESR ceramic capacitor (1.0μF,
X7R) from this pin to GND.
5
SCL Synchronous clock signal input of SMBus/PMBus/I²C.
6
SALERT Output pin for transferring the active low signal driven asynchronously from the VR controller to SMBus/PMBus.
7
SDA I/O pin for transferring data signals between SMBus/PMBus/I²C host and VR controller.
8
PGOOD Open-drain indicator output.
9
RGND This pin monitors the negative rail of regulator output. Connect to ground at point of regulation.
10
VSEN This pin monitors the positive rail of regulator output. Connect to point of regulation
11
CSRTN This pin monitors the negative flow of output current for overcurrent protection and telemetry.
12
CSEN This pin monitors the positive flow of output current with a series resistor and for overcurrent protection and telemetry. The
series resistor sets the current gain and should be within 40Ωand 3.5kΩ.
13
NTC Input pin for the temperature measurement. Connect this pin through an NTC thermistor (10kΩ,  ~ 3380) and a decoupling
capacitor (~0.1μF) to GND and a resistor (1.54kΩ)to VCC of the controller. The voltage at this pin is inversely proportional to
the VR temperature.
14
IOUT Output current monitor pin. An external resistor sets the gain and an external capacitor provides the averaging function; an
external pull-up resistor to VCC is recommended to calibrate the no load offset. See “I_OUT Calibration” on page 19.
15
PROG4 Programming pin for Modulator (R4™) RR impedance and output slew rate during Soft-Start (SS) and Dynamic VID (DVID).
It also sets AV gain multiplier to 1x or 2x and determines the AV gain on PROG3.
16
PROG3 Programming pin for ultrasonic PFM operation, fault behavior, switching frequency and R4™ (AV) control loop gain.
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FN8705.1
March 7, 2016