TPSM846C23_17 Datasheet, PDF (8/82 Pages) Texas Instruments – 4.5-V to 15-V Input, 0.35-V to 2.0-V Output, 35-A PMBus Power Module

TPSM846C23
SLVSDF3C – MARCH 2017 – REVISED AUGUST 2017
www.ti.com
6.7 Switching Characteristics
Over –40°C to 105°C free-air temperature range, V_IN = 12 V, V_OUT = 1.2 V, I_OUT = I_OUT max, ƒ_SW = 500 kHz,
C_IN1 = 4 × 22-µF, 25-V, 1210 ceramic; C_IN2 = 2 × 330-µF, 25-V, electrolytic bulk; C_OUT1 = 4 × 47-µF, 6.3-V, 1210 ceramic;
C_OUT2 = 2 × 470-µF, 6.3-V, polymer bulk (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
OSCILLATOR
ƒ_SW
Switching frequency
Factory default setting.
R_RT = open; RT_SEL grounded
R_RT = 68.1 kΩ, 1%; RT_SEL open
R_RT = 20.0 kΩ, 1%; RT_SEL open
Adjustment range
425
500
575
255
300
345 _kHz
850
1000
1150
250
1200
PWM
t_ON-MIN
t_OFF-MIN
Minimum on time⁽¹⁾
Minimum off time⁽¹⁾
SYNCHRONIZATION
V_IH(sync)
V_IL(sync)
High-level input voltage⁽²⁾
Low-level input voltage⁽²⁾
D_SYNC
Sync input duty cycle
ƒ_SYNC
Sync frequency range
ƒ_SW = 1 MHz
ƒ_SW = 250 kHz to 1.2 MHz
50
100
ns
515
560
ns
2.2
V
0.8
V
50%
250
1200 kHz
(1) Specified by design.
(2) Functionality Verified. Limits guaranteed at internal IC test.
6.8 Programmable Characteristics
Over operating free-air temperature range, V_IN = 12 V, ƒ_SW = 500 kHz (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
SOFT START (PMBus Programmable)
TON_RISE Soft-start time
TON_MAX_ Upper limit in time to power
FAULT_LIMIT up the output
Factory default setting
Programmable range, 16 discrete settings^{(1) (2)}
Accuracy, TON_RISE = 3 ms⁽¹⁾
Factory default setting⁽³⁾
Programmable range, 16 discrete settings^{(1) (3)}
Accuracy ⁽¹⁾
0
–10%
0
–10%
TON_DELAY Turn-on delay
Factory default setting
Programmable range, 16 discrete settings ⁽¹⁾
Accuracy ⁽¹⁾
0
–10%
SOFT STOP (PMBus Programmable)
TOFF_FALL Soft-start time
TOFF_DELAY Turn-on delay
Factory default setting
Programmable range, 16 discrete settings ^{(1) (2)}
Accuracy, TOFF_FALL= 1 ms⁽¹⁾
Factory default setting⁽²⁾
Programmable range, 16 discrete settings⁽¹⁾
Accuracy ⁽¹⁾
0
–10%
0
–10%
UNDERVOLTAGE LOCKOUT (UVLO) (PMBus Programmable)
VIN_ON
Input turn on voltage
Factory default setting
Programmable range, 15 discrete settings ⁽¹⁾
Accuracy ⁽¹⁾
4.25
–5%
TYP MAX UNIT
3
ms
100 ms
10%
0
ms
100 ms
10%
0
ms
100 ms
10%
3
ms
100 ms
10%
0
ms
100 ms
10%
4.5
V
7.75 V
5%
(1) Functionality Verified. Limits guaranteed at internal IC test.
(2) Setting TON_RISE or TOFF_FALL to 0 ms programs the device to bring its output voltage up to the programmed regulation value or
down to 0 V as quickly as possible, resulting in an effective TON_RISE and TOFF_FALL time of 1 ms.
(3) Setting TON_MAX_FAULT_LIMIT to 0 disables the TON_MAX_FAULT response.
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