Rainbow Electronics MAX5958 User Manual

General Description

The MAX5957/MAX5958 triple hot-plug controllers are
designed for PCI Express (PCIe)

®

applications. These
devices provide hot-plug control for 12V, 3.3V, and 3.3V
auxiliary supplies of three PCIe slots. The MAX5957/
MAX5958s’ logic inputs/outputs allow interfacing directly
with the system hot-plug management controller or
through an SMBus™ with an external I/O expander such
as the MAX7313. An integrated debounced attention
switch and present-detect signals simplify system design.

The MAX5957/MAX5958 drive six external n-channel
MOSFETs to control the 12V and 3.3V main outputs. The

3.3V auxiliary outputs are controlled through 0.2Ω n-chan­nel MOSFETs. Internal charge pumps provide the gate
drive for the 12V outputs while the gate drive of the 3.3V
output is driven by the 12V input supply clamped to 5.5V
above the respective 3.3V main supply rail. The 3.3V aux­iliary outputs are completely independent from the main
outputs with their own charge pumps.

At power-up, the MAX5957/MAX5958 keep all the
MOSFETs (internal and external) off until the supplies rise
above their respective undervoltage lockout (UVLO)
thresholds. Upon a turn-on command, the MAX5957/
MAX5958 enhance the external and internal MOSFETs
slowly with a constant gate current to limit the power-sup­ply inrush current.

The MAX5957/MAX5958 actively limit the current to pro­tect all outputs at all times and shut down if an overcur­rent condition occurs. After an overcurrent fault condition,
the MAX5957L/MAX5958L latch off while the MAX5957A/
MAX5958A automatically restart after a restart time delay.
The MAX5957/MAX5958 are offered in latch-off or auto­restart versions (see the

Selector Guide

).

The MAX5957/MAX5958 are available in a 56-pin TQFN
package and operate over the -40°C to +85°C temper­ature range.

Applications

Servers
Desktop Mobile Server Platforms
Workstations
Embedded Devices

Features

o PCIe Compliant

o Hot Swap 12V, 3.3V, and 3.3V Auxiliary for 3

PCIe Slots

o Integrated Power MOSFETs for Auxiliary Supply

Rails

o Controls di/dt and dV/dt

o Active Current Limiting Protects Against

Overcurrent/Short-Circuit Conditions

o Programmable Current-Limit Timeout
o PWRGD Signal Outputs with Programmable

Power-On Reset (POR) (160ms Default)

o Latched FAULT Signal Output After Overcurrent

or Overtemperature Fault

o Attention Switch Inputs/Outputs with 4ms

Debounce

o Present-Detect Inputs

o Force-On Inputs Facilitate Testing/Debug

o Thermal Shutdown

o Allow Control Through SMBus with an I/O

Expander

MAX5957/MAX5958

Triple PCI Express, Hot-Plug Controllers

________________________________________________________________

Maxim Integrated Products

1

Selector Guide

Ordering Information

19-0884; Rev 0; 7/07

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

+

Denotes a lead-free package.

Pin Configuration and Typical Application Circuit appear at
end of data sheet.

PCI Express is a registered trademark of PCI-SIG Corp.
SMBus is a trademark of Intel Corp.

PART TEMP RANGE

MAX5957AETN+ -40°C to +85°C 56 Thin QFN T5677-1

MAX5957LETN+ -40°C to +85°C 56 Thin QFN T5677-1

MAX5958AETN+ -40°C to +85°C 56 Thin QFN T5677-1

MAX5958LETN+ -40°C to +85°C 56 Thin QFN T5677-1

PIN­PACKAGE

PKG

CODE

PART LATCH OFF AUTORESTART GUARANTEED AUX CURRENT (mA)

MAX5957AETN+ √ 375
MAX5957LETN+ √ 375
MAX5958AETN+ √ 550
MAX5958LETN+ √ 550

MAX5957/MAX5958

Triple PCI Express, Hot-Plug Controllers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V

12VIN

= V

12S_+

= V

12S_-

= 12V, V

3.3S_+=V3.3S_-

= V

3.3AUXIN

= V

ON_

= V

AUXON_

= V

FON_

= 3.3V, PWRGD_ = FAULT_ = PORADJ =

TIM = OUTPUT_ = 12G_ = 3.3G_ = OPEN, INPUT_ = PRES-DET_ = PGND = GND, T

A

= TJ= -40°C to +85°C, unless otherwise

noted. Typical values are at T

A

= TJ= +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

(All voltages referenced to GND, unless otherwise noted.)

12VIN......................................................................-0.3V to +14V

12G_ ..........................................................-0.3V to (V

12VIN

+ 6V)

12S_+, 12S_-, 3.3G_ ..............................-0.3V to (V

12VIN

+ 0.3V)

3.3VAUXIN, ON_, FAULT_, PWRGD_.......................-0.3V to +6V

PGND ....................................................................-0.3V to +0.3V

All Other Pins ..................................-0.3V to (V

3.3VAUXIN

+ 0.3V)

Continuous Power Dissipation (T

A

= +70°C)

56-Pin Thin QFN (derate 40mW/°C above +70°C) .....3200mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

12V SUPPLY (MAIN)

12V Supply Input-Voltage Range V

12V Undervoltage Lockout V

12V Undervoltage Lockout
Deglitch Time

12V Supply Current I

12VIN CONTROL

12VIN Current-Limit Threshold

- V

(V

12S+

12G_ Gate Charge Current I

12G_ Gate Discharge Current I

12G_ Gate High Voltage

- V

(V

12G_

12G_ Threshold Voltage for
PWRGD_ Assertion

12S_- Input Bias Current 1µA

12S_+ Input Bias Current 10 30 µA

3.3V SUPPLY (MAIN)

3.3V Supply Voltage Range V

Undervoltage Lockout (Note 3)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

12VIN

V

rising 9.5 10 10.5

12VIN

Hysteresis 0.1

V

falling below V

12IN

12UVLO

to UVLO

assertion

V

= 13.2V 1 2.5 mA

12VIN

V

= GND 4 5 6 µA

12G_

12S-

12UVLO

t

DEG,UVLO

12VIN

V

)

12ILIM

12G, CHG

Normal turn-off, ON_ = GND,
V

= 2V

12G_

12G_, DIS

Output short-circuit condition, strong
gate pulldown to regulation,

12VIN

- V

(V

12S+

V

)

12G, H

V

PGTH12

3.3S_+

I

_ = 1µA 4.8 5.3 5.8 V

12G

Referred to V
(Note 2)

12S-)

≥ 1V, V

12VIN

, I

12G_

12G_

= 5V

= 1µA

3.3SA+ rising 2.50 2.65 2.78 V

Hysteresis 30 mV

10.8 12 13.2 V

30 µs

49 54 59 mV

50 150 250 µA

60 120 200 mA

3.0 4.0 4.8 V

3.0 3.3 3.6 V

V

MAX5957/MAX5958

Triple PCI Express, Hot-Plug Controllers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V

12VIN

= V

12S_+

= V

12S_-

= 12V, V

3.3S_+=V3.3S_-

= V

3.3AUXIN

= V

ON_

= V

AUXON_

= V

FON_

= 3.3V, PWRGD_ = FAULT_ = PORADJ =

TIM = OUTPUT_ = 12G_ = 3.3G_ = OPEN, INPUT_ = PRES-DET_ = PGND = GND, T

A

= TJ= -40°C to +85°C, unless otherwise

noted. Typical values are at T

A

= TJ= +25°C.) (Note 1)

3.3V CONTROL

3.3V Current-Limit Threshold
(V

3.3S_+

3.3G_ Gate Charge Current I

3.3G_ Gate Discharge Current I

3.3G_ Gate High Voltage

- V

(V

3.3G_

3.3G_ Threshold Voltage for
PWRGD_ Assertion

3.3S_- Input Bias Current 1µA

3.3S_+ Input Bias Current 20 60 µA

3.3V AUXILIARY SUPPLY

3.3VAUXIN Supply Input Voltage
Range

3.3VAUXIN Undervoltage
Lockout

3.3VAUXIN Supply Current V

3.3VAUXIN to 3.3VAUXO
Maximum Dropout

3.3VAUXO_ Current-Limit
Threshold

3.3VAUXO_ Threshold for
PWRGD_ Assertion (V3.3VAUXIN

- V3.3VAUXO)

LOGIC SIGNALS

Input-Logic Threshold (ON_,
FON_, AUXON_, PRES-DET_,
INPUT_)

Input Bias Current (ON_,
AUXON_, INPUT_)

FON_, PRES-DET_ Internal Pullup 25 50 75 kΩ

ON_, AUXON_ High-to-Low
Deglitch Time

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

- V

3.3S_+

3.3S_-

V

)

3.3ILIM

3.3G_,CHG

V

= GND 4 5 6 µA

3.3G_

Normal turn-off, ON_ = GND,
V

_ = 2V

3.3G

3.3G_, DIS

Output short-circuit condition, strong
gate pulldown to regulation,
V

_+ - V

3.3S

V

)

3.3G_H

V

PGTH3.3

V

3.3AUXIN

V

3.3VAUXUVLO

I

= 1µA 4.5 5.5 6.8 V

SOURCE

Referred to V
(Note 2)

V

3.3VAUXIN

Hysteresis 30 mV

3.3VAUXIN

I

3.3VAUXO

I

3.3VAUXO

3.3VAUXO_ shorted
to GND

V

PGTH3.3AUX

(Note 2) 400 mV

3.3S_-

3.3AUXIN

≥ 1V, V

, I

3.3G-

3.3G_

= 5V

= 1µA

rising 2.50 2.65 2.78 V

= 3.6V 2.5 5 mA

= 375mA (MAX5957) 225

= 550mA (MAX5958) 280

MAX5957 376 450 564

MAX5958 560 700 850

17 20 23 mV

50 150 250 µA

90 150 250 mA

3.0 4.0 4.5 V

3.0 3.3 3.6 V

Rising edge 1.0 2.0 V

Hysteresis 25 mV

1µA

4µs

mV

mA

MAX5957/MAX5958

Triple PCI Express, Hot-Plug Controllers

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V

12VIN

= V

12S_+

= V

12S_-

= 12V, V

3.3S_+=V3.3S_-

= V

3.3AUXIN

= V

ON_

= V

AUXON_

= V

FON_

= 3.3V, PWRGD_ = FAULT_ = PORADJ =

TIM = OUTPUT_ = 12G_ = 3.3G_ = OPEN, INPUT_ = PRES-DET_ = PGND = GND, T

A

= TJ= -40°C to +85°C, unless otherwise

noted. Typical values are at T

A

= TJ= +25°C.) (Note 1)

Note 1: All devices are 100% production tested at TA= +25°C. Limits over temperature are guaranteed by design.
Note 2: PWRGD_ asserts a time t

POR_HL

after V

PGTH12,VPGTH3.3,

and V

PGTH3.3AUX

conditions are met.

Note 3: The UVLO for the 3.3V supply is sensed at 3.3S_+.
Note 4: This is the time that ON_ or AUXON_ must stay low when resetting a fault condition.

PRES-DET_ High-to-Low Deglitch
Time

PWRGD_ Power-On Reset
Deglitch Time (Note 2)

PWRGD_ Low-to-High Deglitch
Time

PWRGD_, FAULT_ Output Low
Voltage

PWRGD_, FAULT_ Output High
Leakage Current

FAULT_ Timeout t

FAULT_ Timeout During Startup t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

t

DEG

V

PORADJ

= GND 1 µs

357ms

PORADJ = unconnected 90 160 250

t

POR_HL

t

POR_LH

R

R

R

I

SINK

I

SINK

= 20kΩ 35 55 75

PORADJ

= 100kΩ 145 265 380

PORADJ

= 200kΩ 530

PORADJ

= 2mA 0.1

= 30mA 0.8

PWRGD_, FAULT_ = 5.5V 1 µA

TIM = open 5.5 11 17

R

= 15kΩ 1.4 2.6 3.8

FAULT

SU

TIM

R

= 120kΩ 12 22 32

TIM

R

= 300kΩ 53

TIM

ms

4µs

V

ms

2 x

t

FAULT

ms

Autorestart Delay Time t

RESTART

Fault Reset Minimum Pulse Width t

Thermal Shutdown Threshold t

RESET

SD

(Note 4) 100 µs

TJ rising 150

64 x

t

FAULT

Thermal Shutdown Hysteresis 20

OUT_ Debounce Time t

DBC

OUT_ Voltage High I

OUT_ Voltage Low I

= 2mA

SOURCE

= 2mA 0.4 V

SINK

2.6 4.4 6.2 ms

V

3.3 AU X IN

- 0.3

V

3.3 AU X IN

ms

°C

V

MAX5957/MAX5958

Triple PCI Express, Hot-Plug Controllers

_______________________________________________________________________________________

5

Typical Operating Characteristics

(V

12VIN

= V

12S_+

= 12V, V

3.3S_+

= V

3.3S_-

= V

3.3AUXIN

= V

ON_

= V

AUXON_

= V

FON_

= 3.3V, PWRGD_ = FAULT_ = PORADJ = TIM =

OUTPUT_ = OPEN, INPUT_ = PRES-DET_ = PGND = GND. See the

Typical Application Circuit

.)

12V INPUT SUPPLY CURRENT

vs. TEMPERATURE

1.10

1.08

1.06

1.04

1.02

1.00

0.98

0.96

SUPPLY CURRENT (mA)

0.94

0.92

0.90

-40 85

TEMPERATURE (°C)

3.3VAUXO_ OUTPUT VOLTAGE
vs. OUTPUT CURRENT

4.0

3.5

3.0

2.5

2.0

1.5

OUTPUT VOLTAGE (V)

1.0

0.5

0

0 1.0

MAX5957 MAX5958

OUTPUT CURRENT (A)

3.3VAUX INTERNAL SWITCH

MAXIMUM DROPOUT vs. TEMPERATURE

0.20

0.18

0.16

0.14

0.12

0.10

0.08

0.06

DROPOUT VOLTAGE (V)

0.04

0.02

I

= 550mA

LOAD

MAX5958

I

= 375mA

LOAD

MAX5957

0

-40 85

TEMPERATURE (°C)

MAX5957 toc01

3.3VAUXIN SUPPLY CURRENT (mA)

603510-15

5.20

5.15

MAX5957 toc04

5.10

5.05

5.00

4.95

4.90

GATE CHARGE CURRENT (µA)

4.85

4.80

0.80.60.40.2 0.90.70.50.30.1

603510-15

4.75

MAX5957 toc07

12V AND 3.3V CURRENT-LIMIT THRESHOLD (mV)

3.3VAUXIN SUPPLY CURRENT
vs. TEMPERATURE

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

-40 85

TEMPERATURE (°C)

12G_ AND 3.3G_ GATE CHARGE

CURRENT vs. TEMPERATURE

-40 85

TEMPERATURE (°C)

12V AND 3.3V CURRENT-LIMIT THRESHOLD

VOLTAGE vs. TEMPERATURE

60

50

40

30

20

10

0

-40 85

12V CURRENT-LIMIT
THRESHOLD

3.3V CURRENT-LIMIT
THRESHOLD

TEMPERATURE (°C)

12G_

3.3G_

ON_ AND AUXON_ LOW-TO-HIGH THRESHOLD

VOLTAGE vs. TEMPERATURE

1.60

1.55

MAX5957 toc02

1.50

1.45

1.40

1.35

THRESHOLD VOLTAGE (V)

1.30

1.25

1.20

603510-15

-40 85

ON_ THRESHOLD

AUXON_ THRESHOLD

TEMPERATURE (°C)

12G_ AND 3.3G_ GATE DISCHARGE

CURRENT vs. TEMPERATURE

180

175

MAX5957 toc05

170

165

160

GATE DISCHARGE CURRENT (µA)

155

150

603510-15

-40 85

3.3G_

12G_

TEMPERATURE (°C)

AUXILIARY CURRENT LIMIT

vs. TEMPERATURE

1.00

0.90

MAX5957 toc08

0.80

0.70

0.60

0.50

0.40

0.30

AUXILIARY CURRENT (mA)

0.20

0.10

603510-15

0

-40 85

TEMPERATURE (°C)

MAX5958

MAX5957

MAX5957 toc03

603510-15

MAX5957 toc06

603510-15

MAX5957 toc09

603510-15

MAX5957/MAX5958

Triple PCI Express, Hot-Plug Controllers

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(V

12VIN

= V

12S_+

= 12V, V

3.3S_+

= V

3.3S_-

= V

3.3AUXIN

= V

ON_

= V

AUXON_

= V

FON_

= 3.3V, PWRGD_ = FAULT_ = PORADJ = TIM =

OUTPUT_ = OPEN, INPUT_ = PRES-DET_ = PGND = GND. See the

Typical Application Circuit

.)

12V UNDERVOLTAGE LOCKOUT

THRESHOLD vs. TEMPERATURE

MAX5957 toc10

TEMPERATURE (°C)

UVLO THRESHOLD (V)

6035-15 10

9.85

9.90

9.95

10.00

10.05

10.10

10.15

10.20

9.80

-40 85

3.3VAUXON UNDERVOLTAGE LOCKOUT
THRESHOLD vs. TEMPERATURE

MAX5957 toc11

TEMPERATURE (°C)

UVLO THRESHOLD (V)

603510-15

2.54

2.58

2.62

2.66

2.70

2.52

2.56

2.60

2.64

2.68

2.50

-40 85

12V TURN-ON/TURN-OFF TIME

MAX5957 toc12

40ms/div

12V OUTPUT
VOLTAGE

12G_

ON_

PWRGD_

10V/div

20V/div

5V/div

5V/div

3.3V TURN-ON/TURN-OFF TIME

MAX5957 toc13

40ms/div

3.3V OUTPUT
5V/div

3.3G_
10V/div

ON_
5V/div

PWRGD_
5V/div

3.3V AUXILIARY TURN-ON/TURN-OFF TIME

MAX5957 toc14

40ms/div

3.3AUXO_OUTPUT
VOLTAGE
2V/div

AUXON_
2V/div

PWRGD_
2V/div

TURN-ON DELAY 3.3V OUTPUT AND

3.3V AUXILIARY OUTPUT

MAX5957 toc15

4ms/div

5V/div

5V/div

5V/div

5V/div

10V/div

3.3VAUXO_
OUTPUT VOLTAGE

3.3 OUTPUT VOLTAGE

3.3 INPUT,

3.3VAUXIN

3.3G_

PWRGD

FAULT CONDITION ON 12V MAIN OUTPUT

(AUTORESTART OPTION)

MAX5957 toc16

12G_
20V/div

0A

0V

0V

0V

FAULT_
5V/div

12V OUTPUT CURRENT
5A/div

100ms/div

12V OUTPUT VOLTAGE
10V/div

t

RESTART

R

LOAD

STEP TO 1.5Ω

MAX5957/MAX5958

Triple PCI Express, Hot-Plug Controllers

_______________________________________________________________________________________

7

Typical Operating Characteristics (continued)

(V

12VIN

= V

12S_+

= 12V, V

3.3S_+

= V

3.3S_-

= V

3.3AUXIN

= V

ON_

= V

AUXON_

= V

FON_

= 3.3V, PWRGD_ = FAULT_ = PORADJ = TIM =

OUTPUT_ = OPEN, INPUT_ = PRES-DET_ = PGND = GND. See the

Typical Application Circuit

.)

_______________________________________________________________________________________

7

FAULT CONDITION ON 3.3V MAIN OUTPUT

(AUTORESTART OPTION)

R

STEP TO 0.5Ω

LOAD

0A

0V

0V

t

0V

RESTART

100ms/div

FAULT CONDITION ON 12V OUTPUT

(LATCH OPTION MAX5958)

R

STEP TO 1.5Ω

LOAD

MAX5957 toc19

MAX5957 toc17

3.3V MAIN OUTPUT CURRENT
2A/div

3.3G_
10V/div

3.3V OUTPUT VOLTAGE
5V/div

FAULT_
5V/div

12V OUTPUT CURRENT
5A/div

FAULT CONDITION ON AUXILIARY OUTPUT

(AUTORESTART OPTION)

FAULT CONDITION ON 12V OUTPUT

R

STEP

LOAD

TO 1.5Ω

R

STEP TO 4Ω

LOAD

t

RESTART

100ms/div

t

FAULT

MAX5957 toc18

MAX5957 toc20

3.3VAUXO_ OUTPUT CURRENT
500mA/div

0A

3.3VAUXO_ OUTPUT VOLTAGE
2V/div
0V

FAULT_
2V/div
0V

12V OUTPUT CURRENT
5A/div

100ms/div

FAULT CONDITION ON 3.3V OUTPUT

(LATCHOFF OPTION)

R

STEP TO 0.5Ω

LOAD

40ms/div

MAX5957 toc21

12G_
20V/div

12V OUTPUT VOLTAGE
10V/div

FAULT_
5V/div

3.3V OUTPUT CURRENT
2A/div

3.3G_
10V/div

3.3V OUTPUT VOLTAGE
5V/div

FAULT_
5V/div

4ms/div

FAULT CONDITION ON 3.3V MAIN OUTPUT

R

t

FAULT

STEP TO 0.5Ω

4ms/div

MAX5957 toc22

LOAD

12G_
20V/div

12V OUTPUT VOLTAGE
10V/div

FAULT_
5V/div

3.3V OUTPUT CURRENT
2A/div

3.3G_
10V/div

3.3V OUTPUT VOLTAGE
5V/div

FAULT_
5V/div

MAX5957/MAX5958

Triple PCI Express, Hot-Plug Controllers

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(V

12VIN

= V

12S_+

= 12V, V

3.3S_+

= V

3.3S_-

= V

3.3AUXIN

= V

ON_

= V

AUXON_

= V

FON_

= 3.3V, PWRGD_ = FAULT_ = PORADJ = TIM =

OUTPUT_ = OPEN, INPUT_ = PRES-DET_ = PGND = GND. See the

Typical Application Circuit

.)

SHORT CIRCUIT ON 12V MAIN OUTPUT

MAX5957 toc25

12G_
20V/div

FAULT_
5V/div

12V OUTPUT CURRENT
5A/div

2ms/div

12V OUTPUT VOLTAGE
10V/div

SHORT CIRCUIT ON 12V MAIN OUTPUT

MAX5957 toc26

12G_
20V/div

FAULT_
5V/div

12V OUTPUT CURRENT
10A/div

4µs/div

12V OUTPUT VOLTAGE
10V/div

0V

0V

0V

FAULT CONDITION ON AUXILIARY OUTPUT

(LATCHOFF OPTION)

MAX5957 toc23

FAULT_
2V/div

3.3VAUXO_ OUTPUT CURRENT
500mA/div

100ms/div

3.3VAUXO_ OUTPUT VOLTAGE
2V/div

R

LOAD

STEP TO 3.5Ω

MAX5958

FAULT CONDITION ON AUXILIARY OUTPUT

MAX5957 toc24

FAULT_
2V/div

3.3VAUXO_ OUTPUT CURRENT
500mA/div

10ms/div

3.3VAUXO_ OUTPUT VOLTAGE
2V/div

R

LOAD

STEP TO 3Ω

t

FAULT

MAX5958

SHORT CIRCUIT ON 3.3V MAIN OUTPUT

MAX5957 toc27

3.3G_
5V/div

FAULT_
5V/div

3.3V OUTPUT CURRENT
2A/div

2ms/div

3.3V OUTPUT VOLTAGE
5V/div

SHORT CIRCUIT ON 3.3V MAIN OUTPUT

MAX5957 toc28

3.3G_
5V/div

FAULT_
5V/div

3.3V OUTPUT CURRENT
10A/div

2µs/div

3.3V OUTPUT VOLTAGE
5V/div

0V