TLC5970
www.ti.com
SBVS140 –MARCH 2010
ELECTRICAL CHARACTERISTICS
At VCC = 10 V to 36 V and TA = –40°C to +85°C. Typical values at VCC = 24 V, FB = 17 V, and TA = +25°C, unless otherwise
noted.
TLC5970
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
BUCK DC/DC CONVERTER BLOCK
At PH pin. VCC = 10 V to 36V, IO = 500mA,
PH high-side MOS switch is on
RDSON
High-side MOS switch on-resistance VBOOT = VCC + 9 V,
300
770
MΩ
At PH pin. VCC = 36 V, PH = 0 V,
PH high-side MOS switch is off
RDSOFF
VBOOT
High-side MOS switch off-resistance
1
8
MΩ
At BOOT pin. VCC = 10 V, IBOOT = –10 mA,
PH high-side MOS switch is off
V
Boot regulator output voltage
At BOOT pin. VCC = 36 V, PH = 0 V,
IBOOT = no load,
VBOOT1
VSCP
10
V
V
PH high-side MOS switch is off
Short-circuit protection detection
At FB pin
3.75
4
4.25
At FB pin. SDTA/SCKA = 0 V, SDTB/SCKB = 3 V,
SDTY/SDTZ/SCKY/SCKZ/PH/BOOT = open,
FB = 7 V to 17 V, VOUTn = 1.0 V, GSn = 000h,
DCn = BC = 7Fh, RIREF = 15 kΩ,
IFB
18
29
30
mA
mA
internal oscillator mode, and auto repeat mode
At FB pin. SDTA/SCKA = 0 V, SDTB/SCKB = 3 V,
SDTY/SDTZ/SCKY/SCKZ/PH/BOOT = open,
FB = 7 V to 17 V, VOUTn = 1.0 V, GSn = 000h,
DCn = BC = 7Fh, RIREF = 2 kΩ,
IFB1
19
36
internal oscillator mode, and auto repeat mode
At FB pin. SDTA/SDTB = 10 MHz,
SCKA/SCKB = 20 MHz with 0 V to 3 V swing,
SDTY-SDTZ/SCKY-SCKZ = RLDIF = 10 kΩ,
CLDIF = 15 pF, PH/BOOT = open, FB = 7 V to 17 V,
VOUTn = 1.0 V, GSn = FFFh, DCn = BC = 7Fh,
RIREF = 2 kΩ, internal oscillator mode,
and auto repeat mode
IFB2
IFB3
IFB4
60
115
130
mA
mA
mA
Input current
At FB pin. SDTA/SDTB = 10 MHz,
SCKA/SCKB = 20 MHz with 0 V to 3 V swing,
SDTY-SDTZ/SCKY-SCKZ = RLDIF = 2 × 51 Ω,
CLDIF = 50 pF, PH/BOOT = open, FB = 7 V to 17 V,
VOUTn = 1.0 V, GSn = FFFh, DCn = BC = 7Fh,
RIREF = 2 kΩ, internal oscillator mode,
and auto repeat mode
65
68
At FB pin. SDTA/SDTB = 10 MHz,
SCKA/SCKB = 20 MHz with 0 V to 3 V swing,
SDTY-SDTZ/SCKY-SCKZ = RLDIF = 2 × 51 Ω,
CLDIF = 50 pF, PH/BOOT = open, FB = 7 V to 17 V,
VOUTn = 1.0 V, GSn = FFFh, DCn = BC = 7Fh,
RIREF = 1 kΩ, internal oscillator mode,
and auto repeat mode
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