ISL62882HRTZ Intersil, ISL62882HRTZ Datasheet - Page 3

• Manufacturer Part Number: ISL62882HRTZ
• Description: IC REG PWM 2PHASE BUCK 40TQFN
• Manufacturer: Intersil

Specifications of ISL62882HRTZ

• Applications: Controller, Intel IMVP-6.5™
• Voltage - Input: 5 V ~ 25 V
• Number Of Outputs: 1
• Voltage - Output: 0.0125 V ~ 1.5 V
• Operating Temperature: -10°C ~ 100°C
• Mounting Type: *
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Functional Pin Descriptions
ISL62882 ISL62882B
14, 15
10
11
12
13
16
17
18
19
20
21
22
23
1
2
3
4
5
6
7
8
9
-
17, 18
10
11
13
14
15
16
19
20
22
24
25
26
27
28
7
2
3
4
5
6
8
9
ISUM- and ISUM+ Droop current sense input.
3
SYMBOL
LGATE1a
VR_TT#
UGATE1
PHASE1
PGOOD
BOOT1
VSSP1
RBIAS
ISEN2
ISEN1
COMP
VSEN
IMON
PSI#
GND
VDD
NTC
RTN
FB2
VIN
VW
FB
ISL62882, ISL62882B
Signal common of the IC. Unless otherwise stated, signals are referenced to the
GND pin.
regulated voltage. Pull-up externally with a 680Ω resistor to VCCP or 1.9kΩ to
3.3V.
current condition.
A resistor to GND sets internal current reference. Use 147kΩ or 47kΩ. The choice
of Rbias value, together with the ISEN2 pin configuration and the external
resistance from the COMP pin to GND, programs the controller to enable/disable
the overshoot reduction function and to select the CPU/GPU mode.
Thermal overload output indicator.
Thermistor input to VR_TT# circuit.
A resistor from this pin to COMP programs the switching frequency (8kΩ gives
approximately 300kHz).
This pin is the output of the error amplifier. Also, a resistor across this pin and
GND adjusts the overcurrent threshold.
This pin is the inverting input of the error amplifier.
There is a switch between the FB2 pin and the FB pin. The switch is on in 2-phase
mode and is off in 1-phase mode. The components connecting to FB2 are used to
adjust the compensation in 1-phase mode to achieve optimum performance.
Individual current sensing for Phase 2. When ISEN2 is pulled to 5V VDD, the
controller will disable Phase 2.
Individual current sensing for phase 1.
Remote core voltage sense input. Connect to microprocessor die.
Remote voltage sensing return. Connect to ground at microprocessor die.
Battery supply voltage, used for feed-forward.
An analog output. IMON outputs a current proportional to the regulator output
current.
Connect an MLCC capacitor across the BOOT1 and the PHASE1 pins. The boot
capacitor is charged through an internal boot diode connected from the VCCP pin
to the BOOT1 pin, each time the PHASE1 pin drops below VCCP minus the voltage
dropped across the internal boot diode.
the gate of the Phase-1 high-side MOSFET.
Current return path for the Phase-1 high-side MOSFET gate driver. Connect the
PHASE1 pin to the node consisting of the high-side MOSFET source, the low-side
MOSFET drain, and the output inductor of Phase-1.
Current return path for the Phase-1 low-side MOSFET gate driver. Connect the
VSSP1 pin to the source of the Phase-1 low-side MOSFET through a low
impedance path, preferably in parallel with the traces connecting the LGATE1a
and the LGATE1b pins to the gates of the Phase-1 low-side MOSFETs.
the LGATE1a pin to the gate of the Phase-1 low-side MOSFET that is active all the
time.
Power-Good open-drain output indicating when the regulator is able to supply
Low load current indicator input. When asserted low, indicates a reduced load
5V bias power.
Output of the Phase-1 high-side MOSFET gate driver. Connect the UGATE1 pin to
Output of the Phase-1 low-side MOSFET gate driver that is always active. Connect
DESCRIPTION
FN6890.3