TPS54162-Q1 Datasheet, PDF (5/41 Pages) Texas Instruments – 1-A 60-V STEP-DOWN DC/DC CONVERTER WITH LOW QUIESCENT CURRENT

TPS54162-Q1
www.ti.com
SLVSA32C – OCTOBER 2009 – REVISED MAY 2010
DC ELECTRICAL CHARACTERISTICS
VIN = 7 V to 48 V, EN = VIN, T_J = –40°C to 150°C (unless otherwise noted)
TEST
PARAMETER
TEST CONDITIONS
ENABLE (EN)
PT
V_IL
PT
V_IH
PT
I_lkg
Low input threshold voltage
High input threshold voltage
Leakage current into EN terminal
EN = 60 V
EN = 12 V
RESET DELAY (Cdly)
PT
I_O
External capacitor charge current
PT
V_Threshold
Switching threshold voltage
LOW-POWER MODE (LPM)
EN = high
Output voltage in regulation
PT
V_IL
Low input threshold voltage
PT
V_IH
High input threshold voltage
PT
I_lkg
Leakage current into LPM terminal
RESET OUTPUT (RST)
VIN = 12 V
VIN = 12 V
LPM = 5 V
PT
t_rdly
PT VReg_RST
PT
t_nRSTdly
SOFT START (SS)
POR delay timer
Reset threshold voltage for V_Reg
Filter time
Based on Cdly capacitor
Check RST output
Delay before RST is asserted low
PT
I_SS
Soft-start source current
SYNCHRONIZATION (SYNC)
PT
V_IL
PT
V_IH
PT
I_lkg
CT
SYNC (f_ext)
Info SYNC_trans
Info SYNC_trans
CT
CT
Rslew
SYNC_CLK
SYNC_CLK
Low input threshold voltage
High input threshold voltage
Leakage current
External input clock frequency
External clock to internal clock
Internal clock to external clock
Minimum duty cycle
Maximum duty cycle
SYNC = 5 V
VIN = 12 V, V_Reg = 5 V,
180 kHz < f_sw < f_ext < 2 × f_sw < 2.2 MHz
No external clock, VIN = 12 V, V_Reg = 5 V
External clock = 1 MHz, VIN = 12 V,
V_Reg = 5 V
CT
I_Rslew
Rslew = 50 kΩ
CT
I_Rslew
Rslew = 10 kΩ
OVERVOLTAGE SUPERVISORS (OV_TH)
Threshold voltage for V_Reg during
PT
VReg_OV
overvoltage
V_Reg = 5 V
THERMAL SHUTDOWN
Internal switch is turned off
Internal pulldown on V_Reg, OV_TH = 1 V
CT
T_SD
Thermal shutdown junction
temperature
CT
T_HYS
Hysteresis
PT: Production tested
CT: Characterization tested only, not production tested
(1) This is the current flowing into the VReg pin when voltage at OV_TH pin is 1 V.
MIN
1.7
1.4
1.7
3.6
0.768
10
40
1.7
180
30
0.768
TYP MAX UNIT
0.7 V
V
100 135 µA
8
15 µA
2 2.6 µA
2
V
0.7 V
V
65
95 µA
7 ms/nF
0.832 V
20
35 µs
50
60 µA
0.7 V
V
65
95 µA
2200 kHz
32
µs
2.5
µs
%
70 %
20
µA
100
µA
0.832 V
70 ⁽¹⁾
mA
175
°C
30
°C
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