FS26 datasheet(88/156 Pages) NXP

88 / 156 page

NXP Semiconductors

FS26

Safety system basis chip with low power for ASIL D/ASIL B

VPRE

VPRE_IN

COUT_PRE

CBOOT_PRE

LPRE

CIN_PRE

aaa-045465

Figure 24. VPRE schematic with connection to VSUP

18.2.1 VPRE electrical characteristics

TA = –40 °C to 125 °C, unless otherwise specified. VSUP_UVH < VSUP < 36 V, VPRE_PWM + VPRE_HDR < VSUP_PWR < 36 V, unless otherwise specified. All voltages

are referenced to ground.

Symbol

Description

Min

Typ

Max

Unit

Static Electrical Characteristics

VPRE_IN

Input voltage range

With IPRE_PWM ≤ 1.5 A and VBOS = 5 V

VPRE_PWM

+ VPRE_HDR

—

Input voltage headroom range, 600 mA < IPRE_PWM ≤ 1.5 A

(Max RHS_PRE

+ Max RDCR_

LPRE) x

IPRE_PWM x 1.25

—

VPRE_HDR

Input voltage headroom range, IPRE_PWM ≤ 600 mA

400

—

VPRE_PWM

Output voltage in normal mode

(VPRE_OTP[5:0] configuration, 50 mV step)

3.7

—

6.35

VPRE_PFM

Output voltage in standby mode

(VPRE_LP_OTP[5:0] configuration, 50 mV step)

3.7

—

5.35

VPRE_ACC_PWM

Output voltage accuracy in PWM mode for IPRE_PWM ≤ 1.5 A

-2

—

VPRE_ACC_PFM_150m [1]

Output voltage accuracy in PFM mode

10 mA ≤ IPRE_PFM ≤ 100 mA

VSUP = VSUP_PWR = 12 V

VPRE_PFM = 3.7 V

VPRE_PFM_TON_OTP[1:0] = 10

COUT_PRE ≥ 20 µF (effective value)

LPRE = 2.2 µH at FPRE = 2.25 MHz and LPRE = 10 µH at FPRE = 450

kHz

-4

—

VPRE_ACC_PFM_10m[1]

Output voltage accuracy in PFM mode

IPRE_PFM ≤ 10 mA

VSUP = VSUP_PWR = 12 V

VPRE_PFM = 5.05 V

VPRE_PFM_TON_OTP[1:0] = 10

COUT_PRE ≥ 20 µF (effective value)

LPRE = 2.2 µH at FPRE = 2.25 MHz and LPRE = 10 µH at FPRE = 450

kHz

-1.5

—

1.5

IPRE_PWM

Output current capability in PWM mode

—

1.5

IPRE_PFM

Current capability in PFM mode (standby mode only)

—

150

ηPRE_PWM_PEAK

Efficiency in PWM mode

COUT_PRE = 22 µF with ESR = 2 mΩ

LPRE = 10 µH with RDCR_LPRE = 60 mΩ

FPRE = 450 kHz

VSUP = VSUP_PWR = 12 V

VPRE_PWM = 5.4 V with IPRE_PWM = 600 mA

—

Table 100. VPRE electrical characteristics

FS26_SDS

All information provided in this document is subject to legal disclaimers.

Product short data sheet

Rev. 6.0 — 12 December 2025

Document feedback

88 / 156

FS26 Datenblatt(PDF) 88 Page - NXP Semiconductors

FS26 Datenblatt(HTML) 88 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datenblatt Download

Link URL