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ISL62771HRTZ

RENESAS · Power Management - Specialized · TQFN-40(5x5)

ISL62771HRTZ from RENESAS, in a TQFN-40(5x5). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 NTC_NB input Thermistor input to the VR_HOT_L circuit that monitors Northbridge VR temperature.
2 IMON_NB output Northbridge output current monitor; a current proportional to the Northbridge VR output current is sourced from this pin.
3 SVC input Serial VID clock input from the CPU processor master device.
4 VR_HOT_L output Thermal indicator signal to the AMD CPU; thermal overload open-drain output, active LOW.
5 SVD bidirectional Serial VID data bidirectional signal between the CPU processor master device and the VR.
6 VDDIO power_in Processor memory interface power rail; this pin serves as the reference to the controller IC for the processor I/O signal level.
7 SVT output Serial VID Telemetry data line from the controller IC to the CPU, which also provides the telemetry and VID-on-the-fly complete signal.
8 ENABLE input Enable input; a high logic level on this pin enables both VRs.
9 PWROK input System power-good input; when high the SVI 2 interface is active, and this pin must be low before the ISL62771 PGOOD output goes high.
10 IMON output Core output current monitor; a current proportional to the Core VR output current is sourced from this pin.
11 NTC input Thermistor input to the VR_HOT_L circuit that monitors Core VR temperature.
12 ISEN2 input Individual current sensing for Channel 2 of the Core VR; pulling ISEN2 to +5V disables Channel 2 and the Core VR runs in single-phase mode.
13 ISEN1 input Individual current sensing for Channel 1 of the Core VR; if ISEN2 is tied to +5V this pin cannot be left open and must be tied to GND with a 10kΩ resistor, and if ISEN1 is tied to +5V the Core portion of the IC is shut down.
14 ISUMP input Noninverting input of the transconductance amplifier for current monitor and load line of the Core output.
15 ISUMN input Inverting input of the transconductance amplifier for current monitor and load line of the Core output.
16 VSEN input Output voltage sense pin for the Core controller; connect to the +sense pin of the microprocessor die.
17 RTN input Output voltage sense return pin for both the Core VR and Northbridge VR; connect to the -sense pin of the microprocessor die.
18 FB input Output voltage feedback to the inverting input of the Core controller error amplifier.
19 COMP output Core controller error amplifier output; a resistor from COMP to GND sets the Core VR offset voltage.
20 PGOOD output Open-drain output indicating the Core portion of the IC is ready to supply regulated voltage; pull up externally to VDD or 3.3V through a resistor.
21 BOOT1 passive Connect an MLCC capacitor across BOOT1 and PHASE1; the boot capacitor is charged through an internal boot diode from VDDP each time PHASE1 drops below VDDP minus the diode drop.
22 UGATE1 output Output of the Phase 1 high-side MOSFET gate driver of the Core VR; connect to the gate of the Phase 1 high-side MOSFET(s).
23 PHASE1 passive Current return path for the Phase 1 high-side MOSFET gate driver of VR1; connect to the node of the high-side MOSFET source, low-side MOSFET drain and Phase 1 output inductor.
24 LGATE1 output Output of the Phase 1 low-side MOSFET gate driver of the Core VR; connect to the gate of the Phase 1 low-side MOSFET(s).
25 VDD power_in 5V bias power; use a resistor [2Ω] and a decoupling capacitor from the +5V supply, with a high quality X7R MLCC recommended.
26 VDDP power_in Input voltage bias for the internal gate drivers; connect +5V to this pin and decouple with at least 1µF of capacitance to GND.
27 LGATE2 output Output of the Phase 2 low-side MOSFET gate driver of the Core VR; connect to the gate of the Phase 2 low-side MOSFET(s).
28 PHASE2 passive Current return path for the Phase 2 high-side MOSFET gate driver of the Core VR; connect to the node of the high-side MOSFET source, low-side MOSFET drain and Phase 2 output inductor.
29 UGATE2 output Output of the Phase 2 high-side MOSFET gate driver of the Core VR; connect to the gate of the Phase 2 high-side MOSFET(s).
30 BOOT2 passive Connect an MLCC capacitor across BOOT2 and PHASE2; the boot capacitor is charged through an internal boot diode from VDDP each time PHASE2 drops below VDDP minus the diode drop.
31 BOOT_NB passive Boot connection of the Northbridge VR; connect an MLCC capacitor across BOOT_NB and PHASE_NB, charged through an internal boot diode from VDDP.
32 UGATE_NB output High-side MOSFET gate driver output of the Northbridge VR; connect to the gate of the Northbridge high-side MOSFET(s).
33 PHASE_NB passive Phase connection of the Northbridge VR and current return path for the high-side gate driver; connect to the node of the high-side MOSFET source, low-side MOSFET drain and Northbridge output inductor.
34 LGATE_NB output Low-side MOSFET gate driver output of the Northbridge VR; connect to the gate of the Northbridge low-side MOSFET(s).
35 PGOOD_NB output Open-drain output indicating the Northbridge portion of the IC is ready to supply regulated voltage; pull up externally to VDDP or 3.3V through a resistor.
36 COMP_NB output Northbridge VR error amplifier output; a resistor from COMP_NB to GND sets the Northbridge VR offset voltage and the switching frequency for both VRs.
37 FB_NB input Output voltage feedback to the inverting input of the Northbridge controller error amplifier.
38 VSEN_NB input Output voltage sense pin for the Northbridge controller; connect to the +sense pin of the microprocessor die.
39 ISUMN_NB input Inverting input of the transconductance amplifier for current monitor and load line of the Northbridge VR.
40 ISUMP_NB input Noninverting input of the transconductance amplifier for current monitor and load line of the Northbridge VR.
41 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer RENESAS
Package TQFN-40(5x5)
Category Power Management (PMIC)
Pins 41

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage VDD, VDDP VDD -0.3 7 V 10
Battery Voltage VIN 28 V 10
Boot Voltage BOOT -0.3 33 V 10
Boot to Phase Voltage BOOT-PHASE -0.3 7 V DC 10
Boot to Phase Voltage BOOT-PHASE -0.3 9 V <10ns 10
Phase Voltage PHASE -7 V <20ns Pulse Width, 10µJ 10
LGATE Voltage LGATE -2.5 V <20ns Pulse Width, 5µJ 10
Open-Drain Outputs PGOOD, PGOOD_NB, VR_HOT_L -0.3 7 V 10
Maximum Junction Temperature TJ 150 °C 10
Maximum Storage Temperature Range TSTG -65 150 °C 10
Thermal Resistance Junction to Ambient, 40 Ld TQFN θJA 33 °C/W Typical, free air, Notes 4, 5 10
Thermal Resistance Junction to Case, 40 Ld TQFN θJC 3 °C/W Typical, Notes 4, 5 10
Supply Voltage VDD tolerance VDD -5 5 % Nominal +5V ±5% 10
Battery Voltage VIN 4.5 25 V 10
Ambient Temperature HRTZ TA -10 100 °C HRTZ 10
Junction Temperature HRTZ TJ -10 125 °C HRTZ 10
+5V Supply Current IVDD 8 11 mA ENABLE = 1V 10
+5V Supply Current IVDD 1 µA ENABLE = 0V 10
VDD POR Threshold rising VDD_PORr 4.35 4.5 V VDD rising 10
VDD POR Threshold falling VDD_PORf 4 4.15 V VDD falling 10
System Accuracy HRTZ %Error (VOUT) -0.5 0.5 % No load; closed loop, active mode range, VID = 0.75V to 1.55V 10
System Accuracy HRTZ Error (VOUT) -10 10 mV No load; closed loop, active mode range, VID = 0.25V to 0.74375V 10
Maximum Output Voltage VOUT(max) 1.55 V VID = [00000000] 10
Minimum Output Voltage VOUT(min) 0 V VID = [11111111] 10
Nominal Channel Frequency fSW(nom) 280 300 320 kHz 10
Current-Sense Amplifier Input Offset HRTZ -0.15 0.15 mV IFB = 0A 10
Error Amp DC Gain Av0 119 dB 10
Error Amp Gain-Bandwidth Product GBW 17 MHz CL = 20pF 10
PGOOD Low Voltage VOL 0.4 V IPGOOD = 4mA 11
PGOOD Leakage Current IOH -1 1 µA PGOOD = 3.3V 11
PWROK High Threshold 750 mV 11
VR_HOT_L Pull-Down 11 Ω 11
UGATE Pull-Up Resistance RUGPU 1 1.5 Ω 200mA source current 11
UGATE Source Current IUGSRC 2 A UGATE - PHASE = 2.5V 11
UGATE Sink Resistance RUGPD 1 1.5 Ω 250mA sink current 11
UGATE Sink Current IUGSNK 2 A UGATE - PHASE = 2.5V 11
LGATE Pull-Up Resistance RLGPU 1 1.5 Ω 250mA source current 11
LGATE Source Current ILGSRC 2 A LGATE - VSSP = 2.5V 11
LGATE Sink Resistance RLGPD 0.5 0.9 Ω 250mA sink current 11
LGATE Sink Current ILGSNK 4 A LGATE - VSSP = 2.5V 11
UGATE to LGATE Dead Time tUGFLGR 23 ns UGATE falling to LGATE rising, no load 11
Overvoltage Threshold OVH 275 325 375 mV VSEN rising above setpoint for >1µs 11
Undervoltage Threshold OVH 275 325 375 mV VSEN falls below setpoint for >1µs 11
Current Imbalance Threshold 9 mV One ISEN above another ISEN for >1.2ms 11
Way Overcurrent Trip Threshold [IMONx Current Based Detection] IMONxWOC 15 µA All states, IDROOP = 60µA, RIMON = 135kΩ 11
Overcurrent Trip Threshold [IMONx Voltage Based Detection] VIMONx_OCP 1.485 1.51 1.535 V All states, IDROOP = 45µA, IIMONx = 11.25µA, RIMON = 135kΩ 11
ENABLE Input Low VIL 1 V 11
ENABLE Input High HRTZ VIH 1.6 V HRTZ 11
ENABLE Leakage Current IENABLE -1 0 1 µA ENABLE = 0V 11
ENABLE Leakage Current IENABLE 18 35 µA ENABLE = 1V 11
SVC, SVD Input Low VIL 30 % of VDDIO 11
SVC, SVD Input High VIH 70 % of VDDIO 11
SVC, SVD Leakage -1 1 µA ENABLE = 0V, SVC, SVD = 0V and 1V 11
SVC, SVD Leakage -35 -20 -5 µA ENABLE = 1V, SVC, SVD = 0V 11
NTC Source Current 27 30 33 µA NTC = 0.6V 11
NTC Thermal Warning Voltage 600 640 680 mV 11
NTC Thermal Shutdown Voltage 530 580 630 mV 11
VID-on-the-Fly Slew Rate 8 10 12 mV/µs 12

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts copper Channel 1 high-side MOSFET source pin instead of a general connection to PHASE1 copper is recommended for 32

CAD (KiCad official)

  • Symbol: ISL62771HRTZ
  • Footprint: Package_DFN_QFN:QFN-40-1EP_5x5mm_P0.4mm_EP3.6x3.6mm
  • 3D model: TQFN-40(5x5) (KiCad packages3D, STEP)
  • 3D model files: isl62771hrtz-etched.step / isl62771hrtz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); isl62771hrtz.step / isl62771hrtz.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: RENESAS datasheet (35 pp, sha256 8947ca125f369189, retrieved 2026-10-30, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF