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| LMZ34202 Datasheet, PDF (6/31 Pages) Texas Instruments – SIMPLE SWITCHER 4.5-V to 42-V Input, 2-A Power Module | |||
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LMZ34202
SNVSAJ2 â MARCH 2016
www.ti.com
6.5 Electrical Characteristics
Over -40°C to +105°C free-air temperature, PVIN = 24 V, VOUT = 5 V, IOUT = IOUT max, Æsw = 500 kHz,
CIN1 = 1 x 10-µF, 100-V 1210 ceramic, CIN2 = 1 x 100-µF 100-V electrolytic bulk, and COUT = 3 x 47-µF, 16-V 1210 ceramic
(unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
INPUT VOLTAGE (PVIN)
PVIN
Input voltage range
UVLO
PVIN undervoltage lockout
OUTPUT VOLTAGE
Over IOUT range
PVIN increasing
PVIN decreasing
4.5 (1)
42 V
3.2
3.8 V
2.8
V
VOUT (ADJ)
VOUT
Output voltage adjust range
Set-point voltage tolerance
Temperature variation
Line regulation
Load regulation
Total output voltage variation
Over IOUT range
TA = 25°C, IOUT = 200 mA
-40°C ⤠TA ⤠105°C, IOUT = 0 A
TA = 25°C, Over PVIN range, IOUT = 300 mA
TA = 25°C, IOUT = 300 mA to IOUT max
Includes set-point, line, load, and temperature
2.5
7.5 V
±0.7 ±1.5(2)
%
±0.9
%
±0.1
%
±0.3
%
±2
%
VOUT ripple Output voltage ripple
OUTPUT CURRENT
20-MHz Bandwidth
10
mV/pp
IOUT
Output current
IOUT
Output current
IOUT
Output current
ILIM
Overcurrent threshold
PERFORMANCE
TA = 105°C, natural convection
TA = 105°C, 200LFM
TA = 95°C, natural convection
0
1.5 A
0
2A
0
2A
2.5
A
VOUT = 7.5 V; ÆSW = 400 kHz
PVIN = 12 V
IOUT = 1 A
VOUT = 5 V; ÆSW = 200 kHz
VOUT = 5 V; ÆSW = 500 kHz
VOUT = 3.3 V; ÆSW= 200 kHz
η
Efficiency
VOUT = 2.5 V; ÆSW = 200 kHz
VOUT = 7.5 V; ÆSW = 400 kHz
PVIN = 24 V
IOUT = 1 A
VOUT = 5 V; ÆSW= 250 kHz
VOUT = 5 V; ÆSW= 500 kHz
VOUT = 3.3 V; ÆSW = 250 kHz
VOUT = 2.5 V; ÆSW = 250 kHz
Transient response
IOUT = 50%
Recovery time
load step
Over/Undershoot
1 A/µs slew rate
95
%
93
%
92
%
90
%
87
%
92
%
90
%
88
%
86
%
81
%
100
µs
2
%
SLOW START
TSS
INHIBIT
Internal slow start time
SS/TR pin open
4.1
ms
VINH (high)
VINH (low)
Inhibit control
II (shutdown) Input shutdown supply current
POWER GOOD (PWRGD)
Precision inhibit level
Inhibit turn-off hysteresis
INH/UVLO pin conected to AGND
2.00
2.1
-0.294
2.4
2.42 V
V
6.2(3) µA
VPWRGD
PWRGD thresholds
VOUT rising
VOUT falling
Good
Fault
Fault
Good
95
%
110
%
90
%
105
%
(1) The minimum PVIN is 4.5 V or (VOUT / 0.75), whichever is greater. For VOUT = 3.3 V, the minimum PVIN is 4.75 V when IOUT > 1.5 A.
(2) The stated limit of the set-point voltage tolerance includes the tolerance of both the internal voltage reference and the internal
adjustment resistor. The overall output voltage tolerance will be affected by the tolerance of the external RSET resistor.
(3) Guaranteed by design. Not production tested.
6
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